ubuntu-cve-2023-6693
Vulnerability from osv_ubuntu
Published
2024-01-02 10:15
Modified
2025-09-08 16:56
Summary
Details
A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the out_sg variable could be used to read a part of process memory and send it to the wire, causing an information leak.
Severity
5.3 (Medium)
4.9 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "qemu",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-block-extra",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-guest-agent",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-arm",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-common",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-data",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-gui",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-mips",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-misc",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-ppc",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-s390x",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-sparc",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-x86",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-x86-microvm",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-system-x86-xen",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-user",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-user-binfmt",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-user-static",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
},
{
"binary_name": "qemu-utils",
"binary_version": "1:6.2+dfsg-2ubuntu6.22"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "qemu",
"purl": "pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu6.22?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:6.2+dfsg-2ubuntu6.22"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:6.0+dfsg-2expubuntu1",
"1:6.0+dfsg-2expubuntu2",
"1:6.0+dfsg-2expubuntu4",
"1:6.2+dfsg-2ubuntu5",
"1:6.2+dfsg-2ubuntu6",
"1:6.2+dfsg-2ubuntu6.1",
"1:6.2+dfsg-2ubuntu6.2",
"1:6.2+dfsg-2ubuntu6.3",
"1:6.2+dfsg-2ubuntu6.4",
"1:6.2+dfsg-2ubuntu6.5",
"1:6.2+dfsg-2ubuntu6.6",
"1:6.2+dfsg-2ubuntu6.7",
"1:6.2+dfsg-2ubuntu6.8",
"1:6.2+dfsg-2ubuntu6.9",
"1:6.2+dfsg-2ubuntu6.10",
"1:6.2+dfsg-2ubuntu6.11",
"1:6.2+dfsg-2ubuntu6.12",
"1:6.2+dfsg-2ubuntu6.13",
"1:6.2+dfsg-2ubuntu6.14",
"1:6.2+dfsg-2ubuntu6.15",
"1:6.2+dfsg-2ubuntu6.16",
"1:6.2+dfsg-2ubuntu6.17",
"1:6.2+dfsg-2ubuntu6.18",
"1:6.2+dfsg-2ubuntu6.19",
"1:6.2+dfsg-2ubuntu6.21"
]
}
],
"aliases": [],
"details": "A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.",
"id": "UBUNTU-CVE-2023-6693",
"modified": "2025-09-08T16:56:01Z",
"published": "2024-01-02T10:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-6693"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2023-6693"
},
{
"type": "REPORT",
"url": "https://lists.nongnu.org/archive/html/qemu-devel/2024-01/msg00045.html"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-6693"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6954-1"
}
],
"related": [
"USN-6954-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2023-6693"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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