Buffer overflow in Apple Mac OS X
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.356 (98.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.356 · newest: 0.356 · change: 0.000
Affected products
- Apple Mac OS X
- PHP — versions 5.4.0, 5.4.1, 5.4.2
- openSUSE — versions 11.4, 12.2, 12.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2013/dsa-2816 (vendor-advisory)
- git.php.net/
- rhn.redhat.com/errata/RHSA-2013-1824.html (vendor-advisory)
- h20564.www2.hp.com/hpsc/doc/public/display (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2013-12/msg00126.html (vendor-advisory)
- forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Cha…
- secunia.com/advisories/59652 (third-party-advisory)
- www.securityfocus.com/bid/64225 (vdb-entry)
- rhn.redhat.com/errata/RHSA-2013-1826.html (vendor-advisory)
- support.apple.com/kb/HT6150
Frequently asked questions
- What is CVE-2013-6420?
- CVE-2013-6420 is a vulnerability in Apple Mac OS X, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2013-12-17.
- Is CVE-2013-6420 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.