CVE-2021-43395

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.

References

https://illumos.topicbox.com/groups/developer/T1c9e4f27f8c2f959/security-heads-up-illumos14424

https://www.oracle.com/security-alerts/cpujan2022.html

https://www.illumos.org/issues/14424

https://jgardner100.wordpress.com/2022/01/20/security-heads-up/

https://github.com/illumos/illumos-gate/blob/069654420de4aade43c63c43cd2896e66945fc8a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c

https://github.com/illumos/illumos-gate/blob/b3403853e80914bd0aade9b5b605da4878078173/usr/src/uts/common/fs/tmpfs/tmp_dir.c

https://kebe.com/blog/?p=505

http://www.tribblix.org/relnotes.html

https://github.com/illumos/illumos-gate/commit/f859e7171bb5db34321e45585839c6c3200ebb90

Details