CVE-2023-39741

Name: CVE-2023-39741
Creator: NVD / NIST
Published: 2023-08-17T19:15:12.977+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2023-39741 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. lrzip v0.651 was discovered to contain a heap overflow via the libzpaq::PostProcessor::write(int) function at /libzpaq/libzpaq.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted file.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

lrzip v0.651 was discovered to contain a heap overflow via the libzpaq::PostProcessor::write(int) function at /libzpaq/libzpaq.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted file.

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

0.32%

23.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Long Range Zip Project	Long Range Zip	0.651

References

https://gist.github.com/huanglei3/ec9090096aa92445cf0a8baa8e929084
https://github.com/ckolivas/lrzip/issues/246Exploit, Issue Tracking
https://github.com/huanglei3/lrzip_poc/tree/main/lrzip_heap_overflowExploit
https://gist.github.com/huanglei3/ec9090096aa92445cf0a8baa8e929084
https://github.com/ckolivas/lrzip/issues/246Exploit, Issue Tracking
https://github.com/huanglei3/lrzip_poc/tree/main/lrzip_heap_overflowExploit

Timeline

Published: Aug 17, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-39741?

How severe is CVE-2023-39741?

CVE-2023-39741 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39741?

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-2023-39741?

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

Scan your code now

Source: NVD / NIST