CVE-2022-23085: Potential jail escape vulnerabilities in netmap
First published: Thu Feb 15 2024(Updated: )
A user-provided integer option was passed to nmreq_copyin() without checking if it would overflow. This insufficient bounds checking could lead to kernel memory corruption. On systems configured to include netmap in their devfs_ruleset, a privileged process running in a jail can affect the host environment.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | >=12.0<12.3 | |
| FreeBSD Kernel | =12.3 | |
| FreeBSD Kernel | =12.3-p1 | |
| FreeBSD Kernel | =12.3-p2 | |
| FreeBSD Kernel | =12.3-p3 | |
| FreeBSD Kernel | =12.3-p4 | |
| FreeBSD Kernel | =13.0 | |
| FreeBSD Kernel | =13.0-beta1 | |
| FreeBSD Kernel | =13.0-beta2 | |
| FreeBSD Kernel | =13.0-beta3 | |
| FreeBSD Kernel | =13.0-beta3-p1 | |
| FreeBSD Kernel | =13.0-beta4 | |
| FreeBSD Kernel | =13.0-p1 | |
| FreeBSD Kernel | =13.0-p10 | |
| FreeBSD Kernel | =13.0-p2 | |
| FreeBSD Kernel | =13.0-p3 | |
| FreeBSD Kernel | =13.0-p4 | |
| FreeBSD Kernel | =13.0-p5 | |
| FreeBSD Kernel | =13.0-p6 | |
| FreeBSD Kernel | =13.0-p7 | |
| FreeBSD Kernel | =13.0-p8 | |
| FreeBSD Kernel | =13.0-p9 | |
| FreeBSD Kernel | =13.0-rc1 | |
| FreeBSD Kernel | =13.0-rc2 | |
| FreeBSD Kernel | =13.0-rc3 | |
| FreeBSD Kernel | =13.0-rc4 | |
| FreeBSD Kernel | =13.0-rc5 | |
| FreeBSD Kernel | =13.0-rc5-p1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-23085?
CVE-2022-23085 has a high severity rating due to its ability to cause kernel memory corruption.
How do I fix CVE-2022-23085?
To fix CVE-2022-23085, update your FreeBSD installation to a version that includes the security patch.
Which versions of FreeBSD are affected by CVE-2022-23085?
CVE-2022-23085 affects FreeBSD versions from 12.0 to 12.3 and various 13.x releases.
Can unprivileged users exploit CVE-2022-23085?
No, CVE-2022-23085 requires a privileged process running in a jail for exploitation.
What is the nature of the vulnerability in CVE-2022-23085?
CVE-2022-23085 is an insufficient bounds checking vulnerability that can lead to kernel memory corruption.
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