CVE-2023-30571
low-risk
Published 2023-05-29
Libarchive through 3.6.2 can cause directories to have world-writable permissions. The umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time; a race condition with another thread can lead to a permanent umask 0 setting. Such a race condition could lead to implicit directory creation with permissions 0777 (without the sticky bit), which means that any low-privileged local user can delete and rename files inside those directories.
Do I need to act?
-
0.01% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.9/10
Low
LOCAL
/ HIGH complexity
Affected Products (1)
Affected Vendors
References (4)
Issue Tracking
https://github.com/libarchive/libarchive/issues/1876
Release Notes
https://groups.google.com/g/libarchive-announce
Issue Tracking
https://github.com/libarchive/libarchive/issues/1876
Release Notes
https://groups.google.com/g/libarchive-announce
15
/ 100
low-risk
Severity
10/34 · Low
Exploitability
0/34 · Minimal
Exposure
5/34 · Minimal