CVE-2024-56406
A heap buffer overflow vulnerability was discovered in Perl.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.4 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.54% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-787
- Affected
- perl/perl
- Source
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
References
- https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patchPatch
- https://metacpan.org/release/SHAY/perl-5.38.4/changesRelease Notes
- https://metacpan.org/release/SHAY/perl-5.40.2/changesRelease Notes
- http://www.openwall.com/lists/oss-security/2025/04/13/3Mailing List
- http://www.openwall.com/lists/oss-security/2025/04/13/4Mailing List
- http://www.openwall.com/lists/oss-security/2025/04/13/5Mailing List
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.