UpHeron
All vulnerabilities

Servers and applications

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…

Severity
High 7.5
Published
17 Dec 2013
Last changed
17 Jun 2026
Added to UpHeron
14 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • Version 5.5.6
  • Version 5.5.5
  • Version 5.5.4
  • Version 5.5.3
All 76 release lines
  • Every version up to 5.3.27
  • Version 5.3.0
  • Version 5.3.1
  • Version 5.3.2
  • Version 5.3.3
  • Version 5.3.4
  • Version 5.3.5
  • Version 5.3.6
  • Version 5.3.7
  • Version 5.3.8
  • Version 5.3.9
  • Version 5.3.10
  • Version 5.3.11
  • Version 5.3.12
  • Version 5.3.13
  • Version 5.3.14
  • Version 5.3.15
  • Version 5.3.16
  • Version 5.3.17
  • Version 5.3.18
  • Version 5.3.19
  • Version 5.3.20
  • Version 5.3.21
  • Version 5.3.22
  • Version 5.3.23
  • Version 5.3.24
  • Version 5.3.25
  • Version 5.3.26
  • Version 5.4.0
  • Version 5.4.1
  • Version 5.4.2
  • Version 5.4.3
  • Version 5.4.4
  • Version 5.4.5
  • Version 5.4.6
  • Version 5.4.7
  • Version 5.4.8
  • Version 5.4.9
  • Version 5.4.10
  • Version 5.4.11
  • Version 5.4.12-rc1
  • Version 5.4.12-rc2
  • Version 5.4.12
  • Version 5.4.13-rc1
  • Version 5.4.13
  • Version 5.4.14-rc1
  • Version 5.4.14
  • Version 5.4.15-rc1
  • Version 5.4.15
  • Version 5.4.16-rc1
  • Version 5.4.16
  • Version 5.4.17
  • Version 5.4.18
  • Version 5.4.19
  • Version 5.4.20
  • Version 5.4.21
  • Version 5.4.22
  • Version 5.5.0-alpha1
  • Version 5.5.0-alpha2
  • Version 5.5.0-alpha3
  • Version 5.5.0-alpha4
  • Version 5.5.0-alpha5
  • Version 5.5.0-alpha6
  • Version 5.5.0-beta1
  • Version 5.5.0-beta2
  • Version 5.5.0-beta3
  • Version 5.5.0-beta4
  • Version 5.5.0-rc1
  • Version 5.5.0-rc2
  • Version 5.5.0
  • Version 5.5.1
  • Version 5.5.2
  • Version 5.5.3
  • Version 5.5.4
  • Version 5.5.5
  • Version 5.5.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2013-6420
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2013-6420