CVE-2023-30571
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.
Does this matter?
Lower severity and a low EPSS score (0.19%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
- EPSS
- 0.19% probability · 9th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- libarchive/libarchive
- Source
- cve@mitre.org
References
- https://github.com/libarchive/libarchive/issues/1876Issue Tracking
- https://groups.google.com/g/libarchive-announceRelease Notes
- https://github.com/libarchive/libarchive/issues/1876Issue Tracking
- https://groups.google.com/g/libarchive-announceRelease Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.