High severity · published Apr 13, 2025
CVE-2024-56406
A heap buffer overflow vulnerability was discovered in Perl
8.4
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PE
Perl · Perl
5.33.1 before 5.38.4; 5.39.0 before 5.40.2; 5.41.0 through 5.41.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-56406
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-56406
Patch
https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch
Release Notes
https://metacpan.org/release/SHAY/perl-5.38.4/changes
Release Notes
https://metacpan.org/release/SHAY/perl-5.40.2/changes
Mailing List
http://www.openwall.com/lists/oss-security/2025/04/13/3
Mailing List
http://www.openwall.com/lists/oss-security/2025/04/13/4
Mailing List
http://www.openwall.com/lists/oss-security/2025/04/13/5
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