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01 Record

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

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
35.63% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 98.3% of scored records. A rank, not a probability.
NVD base score
The NVD has published no score for this record
NVD CVSS vector
No NVD score to derive
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2013-12-17 02:00Z12 YR AGO
Last updated
2024-08-06 17:39Z2 YR AGO
Reserved
2013-11-04
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
  • CWE-131Incorrect Calculation of Buffer SizeBase
Data version
5.1
Document digest
061f7c4f9e62bcfd37dd9c7257b3cc92f8732cf3e0c839692ac8d3ed464cd5bf

05 Affected products

VendorProductVersionsPlatforms
applemac_os_xNot specified—
opensuseopensuseNot specified—
phpphpNot specified—
redhatenterprise_linuxNot specified—
redhatopenshiftNot specified—
redhatrhel_elsNot specified—
redhatrhel_eusNot specified—
redhatrhel_mission_criticalNot specified—
redhatrhel_software_collectionsNot specified—

06 References