CVE-2024-56406

Summary

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.

Affected Software

Weaknesses

• CWE-122: CWE-122 Heap-based Buffer Overflow
• CWE-787: CWE-787 Out-of-bounds Write

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2025/04/13/3
• http://www.openwall.com/lists/oss-security/2025/04/13/4
• http://www.openwall.com/lists/oss-security/2025/04/13/5

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch
• https://metacpan.org/release/SHAY/perl-5.38.4/changes
• https://metacpan.org/release/SHAY/perl-5.40.2/changes

• ←Previous
• Next→