Race condition in libarchive - CVE-2023-30571
Published: September 9, 2024
Vulnerability identifier: #VU96964
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-30571
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: libarchive
Affected software:
libarchive
libarchive
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition due to the umask() call inside archive_write_disk_posix.c changes the umask of the whole process for a very short period of time. 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.
How to mitigate CVE-2023-30571
Install updates from vendor's website.