CVE-2024-56406

HIGH EPSS 37.4%
Published Apr 13, 20251y ago · Modified Jun 17, 20261w ago
8.4 CVSS 3.1
High
Find Similar
Published Apr 13, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.4
Exploitability
2.5
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
37.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-122
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 3

VendorProductVersionRange
perlperl*≥5.33.1  –  <5.38.4
perlperl*≥5.39.0  –  <5.40.2
perlperl*≥5.41.0  –  ≤5.41.10

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2025/04/13/3
    Mailing List
  • openwall.com http://www.openwall.com/lists/oss-security/2025/04/13/4
    Mailing List
  • openwall.com http://www.openwall.com/lists/oss-security/2025/04/13/5
    Mailing List
  • github.com https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch
    Patch
  • metacpan.org https://metacpan.org/release/SHAY/perl-5.38.4/changes
    Release Notes
  • metacpan.org https://metacpan.org/release/SHAY/perl-5.40.2/changes
    Release Notes

Remediation

  • github.com https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch
    Patch