Medium severity · published May 29, 2023
CVE-2023-30571
Libarchive through 3.6.2 can cause directories to have world-writable permissions
5.3
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libarchive · Libarchive
through 3.6.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-30571
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-30571
Issue Tracking
https://github.com/libarchive/libarchive/issues/1876
Release Notes
https://groups.google.com/g/libarchive-announce
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