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Fencer Intel
medium 5.0

CVE-2012-5526 json

CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, which might allow remote attacke…

published 2012-11-21 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-5418

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, which might allow remote attackers to inject arbitrary headers into responses from applications that use CGI.pm.

Patch / fix

  • perl Debian 14, Debian 13, Debian 12 5.14.2-16
  • libcgi-pm-perl Debian 14, Debian 13, Debian 12 3.61-2

debian advisories DEBIAN-CVE-2012-5526

  • perl RHEL 5 4:5.8.8-40.el5_9
  • perl RHEL 6 4:5.10.1-130.el6_4
  • perl-CGI RHEL 6 3.51-130.el6_4
  • perl-core RHEL 6 5.10.1-130.el6_4
  • perl-CPAN RHEL 6 1.9402-130.el6_4
  • perl-libs RHEL 6 4:5.10.1-130.el6_4
  • perl-parent RHEL 6 1:0.221-130.el6_4
  • perl-IO-Zlib RHEL 6 1:1.09-130.el6_4

red hat advisories RHSA-2013:0685

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-5526 updated cvss 2.6

perl-CGI: Newline injection due to improper CRLF escaping in Set-Cookie and P3P headers

  • Red Hat Enterprise Linux (v. 5 server) perl 5.8.8-40.el5_9, perl-suidperl 5.8.8-40.el5_9 Red Hat Enterprise Linux Desktop (v. 6) perl 5.10.1-130.el6_4, perl-CGI 3.51-130.el6_4, perl-core 5.10.1-130.el6_4, perl-CPAN 1.9402-130.el6_4, perl-libs 5.10.1-130.el6_4, perl-IO-Zlib 1.09-130.el6_4, +39 more Red Hat Enterprise Linux HPC Node (v. 6) perl 5.10.1-130.el6_4, perl-CGI 3.51-130.el6_4, perl-core 5.10.1-130.el6_4, perl-CPAN 1.9402-130.el6_4, perl-libs 5.10.1-130.el6_4, perl-IO-Zlib 1.09-130.el6_4, +39 more Red Hat Enterprise Linux Server (v. 6) perl 5.10.1-130.el6_4, perl-CGI 3.51-130.el6_4, perl-core 5.10.1-130.el6_4, perl-CPAN 1.9402-130.el6_4, perl-libs 5.10.1-130.el6_4, perl-IO-Zlib 1.09-130.el6_4, +39 more Red Hat Enterprise Linux Workstation (v. 6) perl 5.10.1-130.el6_4, perl-CGI 3.51-130.el6_4, perl-core 5.10.1-130.el6_4, perl-CPAN 1.9402-130.el6_4, perl-libs 5.10.1-130.el6_4, perl-IO-Zlib 1.09-130.el6_4, +39 more
    fixed: vendor fix RHSA-2013:0685

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.26% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.