CVE-2013-4623

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-09-30 · updated 2026-06-16
Weakness: CWE-20

Description

The x509parse_crt function in x509.h in PolarSSL 1.1.x before 1.1.7 and 1.2.x before 1.2.8 does not properly parse certificate messages during the SSL/TLS handshake, which allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a certificate message that contains a PEM encoded certificate.

Affected products

PolarSSL: 1.1.0, 1.1.0-rc0, 1.1.0-rc1, 1.1.1, 1.1.2, 1.1.3 (+11)

References

http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115922.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115927.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116351.html
http://www.debian.org/security/2013/dsa-2782
http://www.securityfocus.com/bid/61764
https://bugzilla.redhat.com/show_bug.cgi?id=997767
https://github.com/polarssl/polarssl/commit/1922a4e6aade7b1d685af19d4d9339ddb5c02859
https://polarssl.org/tech-updates/security-advisories/polarssl-security-advisory-2013-03
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115922.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115927.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116351.html
http://www.debian.org/security/2013/dsa-2782

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