Common Weakness Enumeration
CWE-362
Allowed-with-ReviewConcurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Abstraction: Class · Status: Draft
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
2900 vulnerabilities reference this CWE, most recent first.
CVE-2021-24377 (GCVE-0-2021-24377)
Vulnerability from cvelistv5 – Published: 2021-06-21 19:18 – Updated: 2024-08-03 19:28
VLAI
EPSS
VEX
Title
Autoptimize < 2.7.8 - Race Condition leading to RCE
Summary
The Autoptimize WordPress plugin before 2.7.8 attempts to remove potential malicious files from the extracted archive uploaded via the 'Import Settings' feature, however this is not sufficient to protect against RCE as a race condition can be achieved in between the moment the file is extracted on the disk but not yet removed. It is a bypass of CVE-2020-24948.
Severity
No CVSS data available.
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/85c0a564-2e56-41… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | Autoptimize |
Affected:
2.7.8 , < 2.7.8
(custom)
|
Credits
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CVE-2021-23133 (GCVE-0-2021-23133)
Vulnerability from cvelistv5 – Published: 2021-04-22 18:00 – Updated: 2024-09-16 19:04
VLAI
EPSS
VEX
Title
Linux Kernel sctp_destroy_sock race condition
Summary
A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.
Severity
6.7 (Medium)
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://www.openwall.com/lists/oss-security/2021/… | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| http://www.openwall.com/lists/oss-security/2021/05/10/1 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2021/05/10/2 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2021/05/10/4 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2021/05/10/3 | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2021061… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Linux Kernel | Linux Kernel |
Affected:
unspecified , < 5.12-rc8
(custom)
|
Date Public
2021-04-13 00:00
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CVE-2021-21005 (GCVE-0-2021-21005)
Vulnerability from cvelistv5 – Published: 2021-06-25 18:25 – Updated: 2024-09-17 02:17
VLAI
EPSS
VEX
Title
Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products
Summary
In Phoenix Contact FL SWITCH SMCS series products in multiple versions if an attacker sends a hand-crafted TCP-Packet with the Urgent-Flag set and the Urgent-Pointer set to 0, the network stack will crash. The device needs to be rebooted afterwards.
Severity
7.5 (High)
CWE
- CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.vde.com/en-us/advisories/vde-2021-023 | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Phoenix Contact | FL SWITCH |
Affected:
SMCS 16TX (2700996) , ≤ 4.70
(custom)
Affected: SMCS 14TX/2FX (2700997) , ≤ 4.70 (custom) Affected: SMCS 14TX/2FX-SM (2701466) , ≤ 4.70 (custom) Affected: SMCS 8GT (2891123) , ≤ 4.70 (custom) Affected: SMCS 6GT/2SFP (2891479) , ≤ 4.70 (custom) Affected: SMCS 8TX-PN (2989103) , ≤ 4.70 (custom) Affected: SMCS 4TX-PN (2989093) , ≤ 4.70 (custom) Affected: SMCS 8TX (2989226) , ≤ 4.70 (custom) Affected: SMCS 6TX/2SFP (2989323) , ≤ 4.70 (custom) Affected: SMN 6TX/2POF-PN (2700290) , ≤ 4.70 (custom) Affected: SMN 8TX-PN (2989501) , ≤ 4.70 (custom) Affected: SMN 6TX/2FX (2989543) , ≤ 4.70 (custom) Affected: SMN 6TX/2FX SM (2989556) , ≤ 4.70 (custom) |
|
| Phoenix Contact | FL NAT |
Affected:
SMN 8TX (2989365) , ≤ 4.63
(custom)
Affected: SMN 8TX-M (2702443) , ≤ 4.63 (custom) |
Date Public
2021-06-23 00:00
Credits
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CVE-2021-20321 (GCVE-0-2021-20321)
Vulnerability from cvelistv5 – Published: 2022-02-18 17:50 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Severity
No CVSS data available.
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2013242 | x_refsource_MISC |
| https://lore.kernel.org/all/20211011134508.748956… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2022/dsa-5096 | vendor-advisoryx_refsource_DEBIAN |
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CVE-2021-20316 (GCVE-0-2021-20316)
Vulnerability from cvelistv5 – Published: 2022-08-23 00:00 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.
Severity
No CVSS data available.
CWE
- CWE-362 - - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
6 references
Impacted products
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CVE-2021-20261 (GCVE-0-2021-20261)
Vulnerability from cvelistv5 – Published: 2021-03-11 20:10 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the floppy device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw.
Severity
No CVSS data available.
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1932150 | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
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CVE-2021-20251 (GCVE-0-2021-20251)
Vulnerability from cvelistv5 – Published: 2023-03-06 00:00 – Updated: 2025-03-06 15:49
VLAI
EPSS
VEX
Summary
A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
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CVE-2021-4207 (GCVE-0-2021-4207)
Vulnerability from cvelistv5 – Published: 2022-04-29 16:07 – Updated: 2025-03-21 18:03
VLAI
EPSS
VEX
Summary
A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
Severity
No CVSS data available.
CWE
- CWE-362 - >CWE-120
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2036966 | x_refsource_MISC |
| https://starlabs.sg/advisories/21-4207/ | x_refsource_MISC |
| https://www.debian.org/security/2022/dsa-5133 | vendor-advisoryx_refsource_DEBIAN |
| https://security.gentoo.org/glsa/202208-27 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2025032… |
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CVE-2021-4203 (GCVE-0-2021-4203)
Vulnerability from cvelistv5 – Published: 2022-03-25 00:00 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Summary
A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.
Severity
No CVSS data available.
CWE
- CWE-362 - >CWE-416
Assigner
References
6 references
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CVE-2021-4202 (GCVE-0-2021-4202)
Vulnerability from cvelistv5 – Published: 2022-03-25 18:02 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Summary
A use-after-free flaw was found in nci_request in net/nfc/nci/core.c in NFC Controller Interface (NCI) in the Linux kernel. This flaw could allow a local attacker with user privileges to cause a data race problem while the device is getting removed, leading to a privilege escalation problem.
Severity
No CVSS data available.
CWE
- CWE-362 - >CWE-416
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2036682 | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/s… | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/s… | x_refsource_MISC |
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| http://www.openwall.com/lists/oss-security/2022/06/01/2 | mailing-listx_refsource_MLIST |
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| http://www.openwall.com/lists/oss-security/2022/06/07/2 | mailing-listx_refsource_MLIST |
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Mitigation
Architecture and Design
In languages that support it, use synchronization primitives. Only wrap these around critical code to minimize the impact on performance.
Mitigation
Architecture and Design
Use thread-safe capabilities such as the data access abstraction in Spring.
Mitigation
Architecture and Design
- Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring.
- Additionally, this will minimize the amount of synchronization necessary and may even help to reduce the likelihood of a denial of service where an attacker may be able to repeatedly trigger a critical section (CWE-400).
Mitigation
Implementation
When using multithreading and operating on shared variables, only use thread-safe functions.
Mitigation
Implementation
Use atomic operations on shared variables. Be wary of innocent-looking constructs such as "x++". This may appear atomic at the code layer, but it is actually non-atomic at the instruction layer, since it involves a read, followed by a computation, followed by a write.
Mitigation
Implementation
Use a mutex if available, but be sure to avoid related weaknesses such as CWE-412.
Mitigation
Implementation
Avoid double-checked locking (CWE-609) and other implementation errors that arise when trying to avoid the overhead of synchronization.
Mitigation
Implementation
Disable interrupts or signals over critical parts of the code, but also make sure that the code does not go into a large or infinite loop.
Mitigation
Implementation
Use the volatile type modifier for critical variables to avoid unexpected compiler optimization or reordering. This does not necessarily solve the synchronization problem, but it can help.
Mitigation MIT-17
Architecture and Design
Operation
Strategy: Environment Hardening
Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
CAPEC-26: Leveraging Race Conditions
The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file.
CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.