var-202107-1361
Vulnerability from variot
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05. Linux kernel vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM
Summary
Several security issues were fixed in the kernel. A local attacker could use this to possibly execute arbitrary code. (CVE-2021-3600)
It was discovered that the virtual file system implementation in the Linux kernel contained an unsigned to signed integer conversion error. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-33909)
Update instructions
The problem can be corrected by updating your kernel livepatch to the following versions:
Ubuntu 20.04 LTS gcp - 79.1 generic - 79.1 gke - 79.1 gkeop - 79.1 lowlatency - 79.1
Ubuntu 18.04 LTS generic - 79.1 gke - 79.1 gkeop - 79.1 lowlatency - 79.1 oem - 79.1
Ubuntu 16.04 ESM generic - 79.1 lowlatency - 79.1
Ubuntu 14.04 ESM generic - 79.1 lowlatency - 79.1
Support Information
Kernels older than the levels listed below do not receive livepatch updates. If you are running a kernel version earlier than the one listed below, please upgrade your kernel as soon as possible.
Ubuntu 20.04 LTS linux-aws - 5.4.0-1009 linux-azure - 5.4.0-1010 linux-gcp - 5.4.0-1009 linux-gke - 5.4.0-1033 linux-gkeop - 5.4.0-1009 linux-oem - 5.4.0-26 linux - 5.4.0-26
Ubuntu 18.04 LTS linux-aws - 4.15.0-1054 linux-gke-4.15 - 4.15.0-1076 linux-gke-5.4 - 5.4.0-1009 linux-gkeop-5.4 - 5.4.0-1007 linux-hwe-5.4 - 5.4.0-26 linux-oem - 4.15.0-1063 linux - 4.15.0-69
Ubuntu 16.04 ESM linux-aws - 4.4.0-1098 linux-azure - 4.15.0-1063 linux-azure - 4.15.0-1078 linux-hwe - 4.15.0-69 linux - 4.4.0-168
Ubuntu 14.04 ESM linux-lts-xenial - 4.4.0-168
References
- CVE-2021-3600
- CVE-2021-33909
-- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce . 7.4) - noarch, x86_64
- Description:
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Bug Fix(es):
-
kernel-rt: update RT source tree to the latest RHEL-8.2.z10 Batch source tree (BZ#1968022)
-
8) - ppc64le, x86_64
-
Description:
This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. 7.7) - ppc64, ppc64le, x86_64
- -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256
====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2021:2725-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:2725 Issue date: 2021-07-20 CVE Names: CVE-2019-20934 CVE-2020-11668 CVE-2021-33033 CVE-2021-33034 CVE-2021-33909 ==================================================================== 1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
- Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
- Description:
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
-
kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)
-
kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)
-
kernel: use-after-free in show_numa_stats function (CVE-2019-20934)
-
kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668)
-
kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c (CVE-2021-33033)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
-
[RHEL7.9.z] n_tty_open: "BUG: unable to handle kernel paging request" (BZ#1872778)
-
[ESXi][RHEL7.8]"qp_alloc_hypercall result = -20" / "Could not attach to queue pair with -20" with vSphere Fault Tolerance enabled (BZ#1892237)
-
[RHEL7.9][s390x][Regression] Sino Nomine swapgen IBM z/VM emulated DASD with DIAG driver returns EOPNOTSUPP (BZ#1910395)
-
False-positive hard lockup detected while processing the thread state information (SysRq-T) (BZ#1912221)
-
RHEL7.9 zstream - s390x LPAR with NVMe SSD will panic when it has 32 or more IFL (pci) (BZ#1917943)
-
The NMI watchdog detected a hard lockup while printing RCU CPU stall warning messages to the serial console (BZ#1924688)
-
nvme hangs when trying to allocate reserved tag (BZ#1926825)
-
[REGRESSION] "call into AER handling regardless of severity" triggers do_recovery() unnecessarily on correctable PCIe errors (BZ#1933663)
-
Module nvme_core: A double free of the kmalloc-512 cache between nvme_trans_log_temperature() and nvme_get_log_page(). (BZ#1946793)
-
sctp - SCTP_CMD_TIMER_START queues active timer kernel BUG at kernel/timer.c:1000! (BZ#1953052)
-
[Hyper-V][RHEL-7]When CONFIG_NET_POLL_CONTROLLER is set, mainline commit 2a7f8c3b1d3fee is needed (BZ#1953075)
-
Kernel panic at cgroup_is_descendant (BZ#1957719)
-
[Hyper-V][RHEL-7]Commits To Fix Kdump Failures (BZ#1957803)
-
IGMPv2 JOIN packets incorrectly routed to loopback (BZ#1958339)
-
[CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1960193)
-
mlx4: Fix memory allocation in mlx4_buddy_init needed (BZ#1962406)
-
incorrect assertion on pi_state->pi_mutex.wait_lock from pi_state_update_owner() (BZ#1965495)
-
Solution:
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
- Bugs fixed (https://bugzilla.redhat.com/):
1824792 - CVE-2020-11668 kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c 1902788 - CVE-2019-20934 kernel: use-after-free in show_numa_stats function 1961300 - CVE-2021-33033 kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c 1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan 1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer
- Package List:
Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-1160.36.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-1160.36.2.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm perf-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: kernel-3.10.0-1160.36.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-1160.36.2.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm perf-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: kernel-3.10.0-1160.36.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm
ppc64: bpftool-3.10.0-1160.36.2.el7.ppc64.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-3.10.0-1160.36.2.el7.ppc64.rpm kernel-bootwrapper-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debug-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-1160.36.2.el7.ppc64.rpm kernel-devel-3.10.0-1160.36.2.el7.ppc64.rpm kernel-headers-3.10.0-1160.36.2.el7.ppc64.rpm kernel-tools-3.10.0-1160.36.2.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-tools-libs-3.10.0-1160.36.2.el7.ppc64.rpm perf-3.10.0-1160.36.2.el7.ppc64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm python-perf-3.10.0-1160.36.2.el7.ppc64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
ppc64le: bpftool-3.10.0-1160.36.2.el7.ppc64le.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debug-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-devel-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-headers-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-tools-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-tools-libs-3.10.0-1160.36.2.el7.ppc64le.rpm perf-3.10.0-1160.36.2.el7.ppc64le.rpm perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm python-perf-3.10.0-1160.36.2.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
s390x: bpftool-3.10.0-1160.36.2.el7.s390x.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm kernel-3.10.0-1160.36.2.el7.s390x.rpm kernel-debug-3.10.0-1160.36.2.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.s390x.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-1160.36.2.el7.s390x.rpm kernel-devel-3.10.0-1160.36.2.el7.s390x.rpm kernel-headers-3.10.0-1160.36.2.el7.s390x.rpm kernel-kdump-3.10.0-1160.36.2.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm kernel-kdump-devel-3.10.0-1160.36.2.el7.s390x.rpm perf-3.10.0-1160.36.2.el7.s390x.rpm perf-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm python-perf-3.10.0-1160.36.2.el7.s390x.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm
x86_64: bpftool-3.10.0-1160.36.2.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm perf-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64: bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-1160.36.2.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-1160.36.2.el7.ppc64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
ppc64le: bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-1160.36.2.el7.ppc64le.rpm perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
x86_64: bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: kernel-3.10.0-1160.36.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-1160.36.2.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm perf-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/
- References:
https://access.redhat.com/security/cve/CVE-2019-20934 https://access.redhat.com/security/cve/CVE-2020-11668 https://access.redhat.com/security/cve/CVE-2021-33033 https://access.redhat.com/security/cve/CVE-2021-33034 https://access.redhat.com/security/cve/CVE-2021-33909 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/RHSB-2021-006
- Contact:
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1
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"data": "fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05. Linux kernel vulnerabilities\n\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 20.04 LTS\n- Ubuntu 18.04 LTS\n- Ubuntu 16.04 ESM\n- Ubuntu 14.04 ESM\n\nSummary\n\nSeveral security issues were fixed in the kernel. A local attacker could use this to\npossibly execute arbitrary code. (CVE-2021-3600)\n\nIt was discovered that the virtual file system implementation in the\nLinux kernel contained an unsigned to signed integer conversion error. \nA local attacker could use this to cause a denial of service (system\ncrash) or execute arbitrary code. (CVE-2021-33909)\n\nUpdate instructions\n\nThe problem can be corrected by updating your kernel livepatch to the\nfollowing versions:\n\nUbuntu 20.04 LTS\n gcp - 79.1\n generic - 79.1\n gke - 79.1\n gkeop - 79.1\n lowlatency - 79.1\n\nUbuntu 18.04 LTS\n generic - 79.1\n gke - 79.1\n gkeop - 79.1\n lowlatency - 79.1\n oem - 79.1\n\nUbuntu 16.04 ESM\n generic - 79.1\n lowlatency - 79.1\n\nUbuntu 14.04 ESM\n generic - 79.1\n lowlatency - 79.1\n\nSupport Information\n\nKernels older than the levels listed below do not receive livepatch\nupdates. If you are running a kernel version earlier than the one\nlisted\nbelow, please upgrade your kernel as soon as possible. \n\nUbuntu 20.04 LTS\n linux-aws - 5.4.0-1009\n linux-azure - 5.4.0-1010\n linux-gcp - 5.4.0-1009\n linux-gke - 5.4.0-1033\n linux-gkeop - 5.4.0-1009\n linux-oem - 5.4.0-26\n linux - 5.4.0-26\n\nUbuntu 18.04 LTS\n linux-aws - 4.15.0-1054\n linux-gke-4.15 - 4.15.0-1076\n linux-gke-5.4 - 5.4.0-1009\n linux-gkeop-5.4 - 5.4.0-1007\n linux-hwe-5.4 - 5.4.0-26\n linux-oem - 4.15.0-1063\n linux - 4.15.0-69\n\nUbuntu 16.04 ESM\n linux-aws - 4.4.0-1098\n linux-azure - 4.15.0-1063\n linux-azure - 4.15.0-1078\n linux-hwe - 4.15.0-69\n linux - 4.4.0-168\n\nUbuntu 14.04 ESM\n linux-lts-xenial - 4.4.0-168\n\nReferences\n\n- CVE-2021-3600\n- CVE-2021-33909\n\n\n\n-- \nubuntu-security-announce mailing list\nubuntu-security-announce@lists.ubuntu.com\nModify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce\n. 7.4) - noarch, x86_64\n\n3. Description:\n\nThe kernel-rt packages provide the Real Time Linux Kernel, which enables\nfine-tuning for systems with extremely high determinism requirements. \n\nBug Fix(es):\n\n* kernel-rt: update RT source tree to the latest RHEL-8.2.z10 Batch source\ntree (BZ#1968022)\n\n4. 8) - ppc64le, x86_64\n\n3. Description:\n\nThis is a kernel live patch module which is automatically loaded by the RPM\npost-install script to modify the code of a running kernel. 7.7) - ppc64, ppc64le, x86_64\n\n3. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA256\n\n==================================================================== \nRed Hat Security Advisory\n\nSynopsis: Important: kernel security and bug fix update\nAdvisory ID: RHSA-2021:2725-01\nProduct: Red Hat Enterprise Linux\nAdvisory URL: https://access.redhat.com/errata/RHSA-2021:2725\nIssue date: 2021-07-20\nCVE Names: CVE-2019-20934 CVE-2020-11668 CVE-2021-33033\n CVE-2021-33034 CVE-2021-33909\n====================================================================\n1. Summary:\n\nAn update for kernel is now available for Red Hat Enterprise Linux 7. \n\nRed Hat Product Security has rated this update as having a security impact\nof Important. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available for each vulnerability\nfrom the CVE link(s) in the References section. \n\n2. Relevant releases/architectures:\n\nRed Hat Enterprise Linux Client (v. 7) - noarch, x86_64\nRed Hat Enterprise Linux Client Optional (v. 7) - x86_64\nRed Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64\nRed Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64\nRed Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64\nRed Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64\nRed Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64\nRed Hat Enterprise Linux Workstation Optional (v. 7) - x86_64\n\n3. Description:\n\nThe kernel packages contain the Linux kernel, the core of any Linux\noperating system. \n\nSecurity Fix(es):\n\n* kernel: size_t-to-int conversion vulnerability in the filesystem layer\n(CVE-2021-33909)\n\n* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an\nhci_chan (CVE-2021-33034)\n\n* kernel: use-after-free in show_numa_stats function (CVE-2019-20934)\n\n* kernel: mishandles invalid descriptors in\ndrivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668)\n\n* kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c\n(CVE-2021-33033)\n\nFor more details about the security issue(s), including the impact, a CVSS\nscore, acknowledgments, and other related information, refer to the CVE\npage(s) listed in the References section. \n\nBug Fix(es):\n\n* [RHEL7.9.z] n_tty_open: \"BUG: unable to handle kernel paging request\"\n(BZ#1872778)\n\n* [ESXi][RHEL7.8]\"qp_alloc_hypercall result = -20\" / \"Could not attach to\nqueue pair with -20\" with vSphere Fault Tolerance enabled (BZ#1892237)\n\n* [RHEL7.9][s390x][Regression] Sino Nomine swapgen IBM z/VM emulated DASD\nwith DIAG driver returns EOPNOTSUPP (BZ#1910395)\n\n* False-positive hard lockup detected while processing the thread state\ninformation (SysRq-T) (BZ#1912221)\n\n* RHEL7.9 zstream - s390x LPAR with NVMe SSD will panic when it has 32 or\nmore IFL (pci) (BZ#1917943)\n\n* The NMI watchdog detected a hard lockup while printing RCU CPU stall\nwarning messages to the serial console (BZ#1924688)\n\n* nvme hangs when trying to allocate reserved tag (BZ#1926825)\n\n* [REGRESSION] \"call into AER handling regardless of severity\" triggers\ndo_recovery() unnecessarily on correctable PCIe errors (BZ#1933663)\n\n* Module nvme_core: A double free of the kmalloc-512 cache between\nnvme_trans_log_temperature() and nvme_get_log_page(). (BZ#1946793)\n\n* sctp - SCTP_CMD_TIMER_START queues active timer kernel BUG at\nkernel/timer.c:1000! (BZ#1953052)\n\n* [Hyper-V][RHEL-7]When CONFIG_NET_POLL_CONTROLLER is set, mainline commit\n2a7f8c3b1d3fee is needed (BZ#1953075)\n\n* Kernel panic at cgroup_is_descendant (BZ#1957719)\n\n* [Hyper-V][RHEL-7]Commits To Fix Kdump Failures (BZ#1957803)\n\n* IGMPv2 JOIN packets incorrectly routed to loopback (BZ#1958339)\n\n* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap\n[7.9.z] (BZ#1960193)\n\n* mlx4: Fix memory allocation in mlx4_buddy_init needed (BZ#1962406)\n\n* incorrect assertion on pi_state-\u003epi_mutex.wait_lock from\npi_state_update_owner() (BZ#1965495)\n\n4. Solution:\n\nFor details on how to apply this update, which includes the changes\ndescribed in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect. \n\n5. Bugs fixed (https://bugzilla.redhat.com/):\n\n1824792 - CVE-2020-11668 kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c\n1902788 - CVE-2019-20934 kernel: use-after-free in show_numa_stats function\n1961300 - CVE-2021-33033 kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c\n1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan\n1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer\n\n6. Package List:\n\nRed Hat Enterprise Linux Client (v. 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Hat Enterprise Linux Workstation Optional (v. 7):\n\nx86_64:\nbpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm\nkernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm\nkernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm\nkernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm\nkernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm\nkernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm\nperf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm\npython-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm\n\nThese packages are GPG signed by Red Hat for security. Our key and\ndetails on how to verify the signature are available from\nhttps://access.redhat.com/security/team/key/\n\n7. References:\n\nhttps://access.redhat.com/security/cve/CVE-2019-20934\nhttps://access.redhat.com/security/cve/CVE-2020-11668\nhttps://access.redhat.com/security/cve/CVE-2021-33033\nhttps://access.redhat.com/security/cve/CVE-2021-33034\nhttps://access.redhat.com/security/cve/CVE-2021-33909\nhttps://access.redhat.com/security/updates/classification/#important\nhttps://access.redhat.com/security/vulnerabilities/RHSB-2021-006\n\n8. Contact:\n\nThe Red Hat security contact is \u003csecalert@redhat.com\u003e. More contact\ndetails at https://access.redhat.com/security/team/contact/\n\nCopyright 2021 Red Hat, Inc. \n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1\n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\nAMB5i8YI9o8=gDcx\n-----END PGP SIGNATURE-----\n\n--\nRHSA-announce mailing list\nRHSA-announce@redhat.com\nhttps://listman.redhat.com/mailman/listinfo/rhsa-announce\n",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.