Perl up to 5.34.3/5.36.3/5.38.3/5.40.1 S_do_trans_invmap heap-based overflow

Summaryinfo

A vulnerability has been found in Perl up to 5.34.3/5.36.3/5.38.3/5.40.1 and classified as critical. This affects the function S_do_trans_invmap. Performing a manipulation results in heap-based overflow. This vulnerability is reported as CVE-2024-56406. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Perl up to 5.34.3/5.36.3/5.38.3/5.40.1. This affects the function S_do_trans_invmap. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A heap buffer overflow vulnerability was discovered in Perl. 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.

The weakness was disclosed by Nathan Mills as 87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2024-56406 since 12/23/2024. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 234241 (Debian dsa-5902 : libperl-dev - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.38.4 or 5.40.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (234241) and CERT Bund (WID-SEC-2025-1850). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Xerox FreeFlow Print Server

Productinfo

Type

• Programming Language Software

Name

• Perl

Version

• 5.34.0
• 5.34.1
• 5.34.2
• 5.34.3
• 5.36.0
• 5.36.1
• 5.36.2
• 5.36.3
• 5.38.0
• 5.38.1
• 5.38.2
• 5.38.3
• 5.40.0
• 5.40.1

License

• open-source

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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