THREATPORT/VULNERABILITY/CVE-2013-6420
HIGH SEVERITY

CVE-2013-6420

Php vulnerability

CVSS
7.5
EPSS
35.6%
EPSS pct
98th
Exploited
No known
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.
Affected vendor
Php
Affected product
Php
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2013-12-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 35.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2013-6420

  • Confirm whether Php Php is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2013-6420.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-6420

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-6420 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2013-6420?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2013-6420.

Start free scan

No credit card. Agentless.

Related vulnerabilities

HIGH
CVE-2020-8511
Pandora Fms vulnerability
HIGH
CVE-2019-19034
Manageengine Assetexplorer vulnerability
HIGH
CVE-2020-7478
Interactive Graphical Scada System vulnerability