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.
Published 2013-12-17 04:46:46
Updated 2018-10-30 16:27:35
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: OverflowMemory CorruptionExecute codeDenial of service

Threat overview for CVE-2013-6420

Top countries where our scanners detected CVE-2013-6420
Top open port discovered on systems with this issue 80
IPs affected by CVE-2013-6420 217,007
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2013-6420!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2013-6420

Probability of exploitation activity in the next 30 days: 94.98%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2013-6420

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST

CWE ids for CVE-2013-6420

References for CVE-2013-6420

Products affected by CVE-2013-6420

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