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CVE-2024-56406

8.4 · HIGH

A heap buffer overflow vulnerability was discovered in Perl.

Published Apr 13, 2025CWE-122EPSS 0.54%

Overview

CVE-2024-56406 is a high-severity vulnerability. It was published on April 13, 2025 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

A heap buffer overflow vulnerability was discovered in Perl.

Release branches 5.34, 5.36, 5.38 and 5.40 are affected, including development versions from 5.33.1 through 5.41.10.

When there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.

   $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'

   Segmentation fault (core dumped)

It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patchRefmetacpan.org/release/SHAY/perl-5.38.4/changesRefmetacpan.org/release/SHAY/perl-5.40.2/changesRefwww.openwall.com/lists/oss-security/2025/04/13/3Refwww.openwall.com/lists/oss-security/2025/04/13/4Refwww.openwall.com/lists/oss-security/2025/04/13/5

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56406?

CVE-2024-56406 is a high-severity vulnerability. It was published on April 13, 2025 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2024-56406?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-56406?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-56406?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56406 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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