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Vulnerability record · CVE-2017-12814 · published 28 September 2017

CVE-2017-12814: Perl memory buffer overflow vulnerability

Perl · Perl

Stack-based buffer overflow in the CPerlHost::Add method in win32/perlhost.h in Perl before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 on Windows allows attackers to execute arbitrary code via a long environment variable.

9.8 CVSS 3.0 Critical EPSS 7.0% · top 6.1% CWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
7.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in the CPerlHost::Add method in win32/perlhost.h in Perl before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 on Windows allows attackers to execute arbitrary code via a long environment variable.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/101051 Third Party AdvisoryVDB Entry
https://perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1 Release NotesVendor Advisory
https://perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1 Release NotesVendor Advisory
https://rt.perl.org/Public/Bug/Display.html?id=131665 ExploitPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20180426-0001/
https://www.oracle.com/security-alerts/cpujul2020.html
http://www.securityfocus.com/bid/101051 Third Party AdvisoryVDB Entry
https://perl5.git.perl.org/perl.git/log/refs/tags/v5.24.3-RC1 Release NotesVendor Advisory
https://perl5.git.perl.org/perl.git/log/refs/tags/v5.26.1-RC1 Release NotesVendor Advisory
https://rt.perl.org/Public/Bug/Display.html?id=131665 ExploitPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20180426-0001/
https://www.oracle.com/security-alerts/cpujul2020.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-8376Perl vulnerabilityPerl 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 overflow when compiling regular express…EPSS 0.48%9.8CVE-2026-4176Perl vulnerabilityPerl 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 vulnerable version of Compress::Raw::Z…EPSS 0.81%9.8CVE-2022-48522Perl out-of-bounds write vulnerabilityIn Perl 5.34.0, function S_find_uninit_var in sv.c has a stack-based crash that can lead to remote code execution or local privilege escalation.EPSS 2.6%9.8CVE-2018-18311Perl integer overflow vulnerabilityPerl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.EPSS 12%9.8CVE-2018-18314Perl memory buffer overflow vulnerabilityPerl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.EPSS 6.1%9.8CVE-2018-18312Perl memory buffer overflow vulnerabilityPerl before 5.26.3 and 5.28.0 before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.EPSS 12%9.8CVE-2018-6797Debian linux out-of-bounds write vulnerabilityAn issue was discovered in Perl 5.18 through 5.26. A crafted regular expression can cause a heap-based buffer overflow, with control over the bytes w…EPSS 6.5%9.8CVE-2018-6913Debian linux out-of-bounds write vulnerabilityHeap-based buffer overflow in the pack function in Perl before 5.26.2 allows context-dependent attackers to execute arbitrary code via a large item c…EPSS 11%

Source: NIST National Vulnerability Database (record CVE-2017-12814), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.