CVE-2023-24056

Name: CVE-2023-24056
Creator: NVD / NIST
Published: 2023-01-22T04:15:11.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2023-24056 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a few hundred bytes can expand to one billion bytes.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a few hundred bytes can expand to one billion bytes.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.51%

39.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Pkgconf	Pkgconf	<= 1.9.3

References

https://gitea.treehouse.systems/ariadne/pkgconf/commit/628b2b2bafa5d3a2017193ddf375093e70666059Patch, Third Party Advisory
https://github.com/pkgconf/pkgconf/tagsRelease Notes, Third Party Advisory
https://nullprogram.com/blog/2023/01/18/Exploit, Third Party Advisory
https://gitea.treehouse.systems/ariadne/pkgconf/commit/628b2b2bafa5d3a2017193ddf375093e70666059Patch, Third Party Advisory
https://github.com/pkgconf/pkgconf/tagsRelease Notes, Third Party Advisory
https://nullprogram.com/blog/2023/01/18/Exploit, Third Party Advisory

Timeline

Published: Jan 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-24056?

How severe is CVE-2023-24056?

CVE-2023-24056 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2023-24056?

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-2023-24056?

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

Scan your code now

Source: NVD / NIST