CVE-2021-43395

Public Exploit

Description

An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb90, OmniOS Community Edition r151038, OpenIndiana Hipster 2021.04, and SmartOS 20210923. A local unprivileged user can cause a deadlock and kernel panic via crafted rename and rmdir calls on tmpfs filesystems. Oracle Solaris 10 and 11 is also affected.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory topicbox.com Vendor Advisory illumos.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/illumos/illumos-gate/blob/069654420de4aade43c63c43cd2896e66945fc8a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c third party advisory exploit
https://github.com/illumos/illumos-gate/blob/b3403853e80914bd0aade9b5b605da4878078173/usr/src/uts/common/fs/tmpfs/tmp_dir.c third party advisory exploit
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch
http://www.tribblix.org/relnotes.html third party advisory release notes
https://jgardner100.wordpress.com/2022/01/20/security-heads-up/ third party advisory
https://illumos.topicbox.com/groups/developer/T1c9e4f27f8c2f959/security-heads-up-illumos14424 vendor advisory
https://www.illumos.org/issues/14424 issue tracking patch vendor advisory
https://github.com/illumos/illumos-gate/commit/f859e7171bb5db34321e45585839c6c3200ebb90 third party advisory patch
https://kebe.com/blog/?p=505 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-43395?
CVE-2021-43395 has been scored as a medium severity vulnerability.
How to fix CVE-2021-43395?
To fix CVE-2021-43395, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43395 being actively exploited in the wild?
It is possible that CVE-2021-43395 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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