CVE-2013-6420
The asn1_time_to_time_t function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse (1) notBefore and (2) notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted certificate that is not properly handled by the openssl_x509_parse function.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-119
- EPSS score
- 35.6% (98th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2013-6233)
- Published
- December 17, 2013
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-6233 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- apple / mac os x
- opensuse / opensuse
- opensuse / opensuse
- opensuse / opensuse
- opensuse / opensuse
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
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- php / php
- php / php
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- php / php
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and 31 more…
Certified products that may be affected
2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Apple Mac OS X 10.6 - Apple Inc. - Common Criteria BSI-DSZ-CC-0536-2010 - archived
- Apple Mac OS X v10.3.6 and Apple Mac OS X Server V10.3.6 - Apple Inc. - Common Criteria CCEVS-VR-0086-2005 - archived
References
- http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=c1224573c773b6845e83505f717fbf820fc18415
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html
- http://rhn.redhat.com/errata/RHSA-2013-1813.html
- http://rhn.redhat.com/errata/RHSA-2013-1815.html
- http://rhn.redhat.com/errata/RHSA-2013-1824.html
- http://rhn.redhat.com/errata/RHSA-2013-1825.html
- http://rhn.redhat.com/errata/RHSA-2013-1826.html
- http://secunia.com/advisories/59652
- http://support.apple.com/kb/HT6150
- http://www.debian.org/security/2013/dsa-2816
- http://www.php.net/ChangeLog-5.php
- http://www.securityfocus.com/bid/64225
- http://www.securitytracker.com/id/1029472
- http://www.ubuntu.com/usn/USN-2055-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1036830(Patch)
- https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
- https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html(Exploit)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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