CVE-2022-23084: Potential jail escape vulnerabilities in netmap
First published: Thu Feb 15 2024(Updated: )
The total size of the user-provided nmreq to nmreq_copyin() was first computed and then trusted during the copyin. This time-of-check to time-of-use bug 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-2022-23084?
CVE-2022-23084 is classified as a high-severity vulnerability due to its potential to lead to kernel memory corruption.
How do I fix CVE-2022-23084?
To address CVE-2022-23084, users should update to the latest patched version of FreeBSD that resolves this vulnerability.
What systems are affected by CVE-2022-23084?
CVE-2022-23084 affects FreeBSD versions 12.0 through 12.3 and versions from 13.0 to 13.0-rc5.
What kind of exploit can result from CVE-2022-23084?
CVE-2022-23084 can be exploited by a privileged process to potentially corrupt kernel memory, leading to system instability.
How can I identify if my FreeBSD system is vulnerable to CVE-2022-23084?
You can check the version of FreeBSD running on your system to determine if it falls within the affected version range for CVE-2022-23084.
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- version/freebsd kernel/12.3-p4
- version/freebsd kernel/13.0
- version/freebsd kernel/13.0-beta1
- version/freebsd kernel/13.0-beta2
- version/freebsd kernel/13.0-beta3
- version/freebsd kernel/13.0-beta3-p1
- version/freebsd kernel/13.0-beta4
- version/freebsd kernel/13.0-p1
- version/freebsd kernel/13.0-p10
- version/freebsd kernel/13.0-p2
- version/freebsd kernel/13.0-p3
- version/freebsd kernel/13.0-p4
- version/freebsd kernel/13.0-p5
- version/freebsd kernel/13.0-p6
- version/freebsd kernel/13.0-p7
- version/freebsd kernel/13.0-p8
- version/freebsd kernel/13.0-p9
- version/freebsd kernel/13.0-rc1
- version/freebsd kernel/13.0-rc2
- version/freebsd kernel/13.0-rc3
- version/freebsd kernel/13.0-rc4
- version/freebsd kernel/13.0-rc5
- version/freebsd kernel/13.0-rc5-p1