CVE-2017-12837

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-09-19 · updated 2026-06-17
Weakness: CWE-119

Description

Heap-based buffer overflow 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 allows remote attackers to cause a denial of service (out-of-bounds write) via a regular expression with a '\N{}' escape and the case-insensitive modifier.

Affected products

perl: through 5.24.2; 5.26.0

References

http://www.debian.org/security/2017/dsa-3982
http://www.securityfocus.com/bid/100860
https://bugzilla.redhat.com/show_bug.cgi?id=1492091
https://perl5.git.perl.org/perl.git/commitdiff/96c83ed78aeea1a0496dd2b2d935869a822dc8a5
https://perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1
https://perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1
https://rt.perl.org/Public/Bug/Display.html?id=131582
https://security.netapp.com/advisory/ntap-20180426-0001/
https://www.oracle.com/security-alerts/cpujul2020.html
http://www.debian.org/security/2017/dsa-3982
http://www.securityfocus.com/bid/100860
https://bugzilla.redhat.com/show_bug.cgi?id=1492091

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