HOMEVULNERABILITIESCVE-2023-30571
MEDIUM

CVE-2023-30571

CWE-362Published: May 29, 2023· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-30571 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.3.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H

Affected Vendors & Products

libarchive1 product(s)
libarchive
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (4)

→
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

Quick Facts

CVE IDCVE-2023-30571
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-362
CISA KEVNo
Affected1 vendor(s)
PublishedMay 29, 2023

Related CVEs (CWE-362)

CVE-2008-6598
10.0
CVE-2015-8556
10.0
CVE-2014-0703
10.0
CVE-2010-1228
10.0
CVE-2020-1660
9.9
CVE-2024-48069
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-30571 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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