CVE-2011-1398

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 10.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-08-30 · updated 2026-06-16
Weakness: CWE-20

Description

The sapi_header_op function in main/SAPI.c in PHP before 5.3.11 and 5.4.x before 5.4.0RC2 does not check for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.

Affected products

PHP: through 5.3.10; 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.3.5 (+4)

References

http://article.gmane.org/gmane.comp.php.devel/70584
http://lists.opensuse.org/opensuse-security-announce/2013-08/msg00006.html
http://openwall.com/lists/oss-security/2012/08/29/5
http://openwall.com/lists/oss-security/2012/09/05/15
http://rhn.redhat.com/errata/RHSA-2013-1307.html
http://secunia.com/advisories/55078
http://security-tracker.debian.org/tracker/CVE-2011-1398
http://www.securitytracker.com/id?1027463
http://www.ubuntu.com/usn/USN-1569-1
https://bugs.php.net/bug.php?id=60227
http://article.gmane.org/gmane.comp.php.devel/70584
http://lists.opensuse.org/opensuse-security-announce/2013-08/msg00006.html

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