CVE-2013-4248

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-08-18 · updated 2026-06-16
Weakness: CWE-20

Description

The openssl_x509_parse function in openssl.c in the OpenSSL module in PHP before 5.4.18 and 5.5.x before 5.5.2 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Affected products

Canonical Ubuntu Linux: 10.04, 12.04, 12.10, 13.04
PHP: through 5.4.17; 5.0.0, 5.0.0-beta1, 5.0.0-beta2, 5.0.0-beta3, 5.0.0-beta4, 5.0.0-rc1 (+83)
Red Hat Enterprise Linux: 5

References

http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=2874696a5a8d46639d261571f915c493cd875897
http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html
http://marc.info/?l=bugtraq&m=141390017113542&w=2
http://rhn.redhat.com/errata/RHSA-2013-1307.html
http://rhn.redhat.com/errata/RHSA-2013-1615.html
http://secunia.com/advisories/54478
http://secunia.com/advisories/54657
http://secunia.com/advisories/55078
http://secunia.com/advisories/59652
http://support.apple.com/kb/HT6150
http://www.debian.org/security/2013/dsa-2742

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