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CVE-2013-6420

UnknownEPSS 34.83%

Last modified

CVE-2013-6420 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 34.83% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
34.83%

98.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
PhpPhp5.4.0
PhpPhp5.4.1
PhpPhp5.4.2
PhpPhp5.4.3
PhpPhp5.4.4
PhpPhp5.4.5
PhpPhp5.4.6
PhpPhp5.4.7
PhpPhp5.4.8
PhpPhp5.4.9
PhpPhp5.4.10
PhpPhp5.4.11
PhpPhp5.4.12
PhpPhp5.4.13
PhpPhp5.4.14
PhpPhp5.4.15
PhpPhp5.4.16
PhpPhp5.4.17
PhpPhp5.4.18
PhpPhp5.4.19
PhpPhp5.4.20
PhpPhp5.4.21
PhpPhp5.4.22
OpensuseOpensuse11.4
OpensuseOpensuse12.2
OpensuseOpensuse12.3
OpensuseOpensuse13.1
AppleMac Os X<= 10.9.1
PhpPhp<= 5.3.27
PhpPhp5.3.0
PhpPhp5.3.1
PhpPhp5.3.2
PhpPhp5.3.3
PhpPhp5.3.4
PhpPhp5.3.5
PhpPhp5.3.6
PhpPhp5.3.7
PhpPhp5.3.8
PhpPhp5.3.9
PhpPhp5.3.10
PhpPhp5.3.11
PhpPhp5.3.12
PhpPhp5.3.13
PhpPhp5.3.14
PhpPhp5.3.15
PhpPhp5.3.16
PhpPhp5.3.17
PhpPhp5.3.18
PhpPhp5.3.19
PhpPhp5.3.20

Showing 50 of 63 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2013-6420?
Severity scoring for CVE-2013-6420 is pending analysis. The EPSS model estimates a 34.83% probability of exploitation in the next 30 days.
How do I fix CVE-2013-6420?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-6420?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST