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    CVE-2017-12837

    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.

    Published:Sep 12, 2017
    Last Modified:Apr 20, 2025
    EPS:Sep 19, 2017
    EPSS Score:0.04284
    CVSS Score:7.5

    Affected Products

    Vendor
    Perl
    Product
    Perl

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-13221 (CVSS 9.1) — Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.10 produce silently in…
    CVE-2026-57432 (CVSS 8.4) — Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer ove…
    CVE-2026-8376 (CVSS 9.8) — Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have a heap buffer …
    CVE-2026-4176 (CVSS 9.8) — Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a…
    CVE-2025-11683 (CVSS 6.5) — YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and pote…
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    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
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High