CVE-2011-1398
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.2%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
- EPSS
- 10.17% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 6 October 2011
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- php/php
- Source
- cve@mitre.org
EPSS 10.2% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
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
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.