Heap-based buffer overflow in Perl - CVE-2017-12837

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Main Vulnerability Database Vulnerabilities #VU32067

Heap-based buffer overflow in Perl - CVE-2017-12837

Published: September 19, 2017 / Updated: December 21, 2022


Vulnerability identifier: #VU32067
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-12837
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the S_regatom function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1. A remote attacker can use a regular expression with a to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Perl
perl (Alpine package)
perl
Fedora

How to mitigate CVE-2017-12837

Install update from vendor's website.

perl (Alpine package) - update to 5.22.3-r0
perl - addressed in versions 5.24.3-388.fc25, 5.24.3-389.fc25, 5.24.3-394.fc26, 5.24.3-395.fc26, 5.26.1-400.fc27, 5.26.1-401.fc27

External References

Related Security Bulletins