CVE-2023-30571

Name: CVE-2023-30571
Creator: NVD / NIST
Published: 2023-05-29T20:15:09.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2023-30571 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H

EPSS Probability

0.19%

9.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libarchive	Libarchive	<= 3.6.2

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

Timeline

Published: May 29, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-30571?

How severe is CVE-2023-30571?

CVE-2023-30571 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2023-30571?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-30571?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST