CVE-2013-4623

Exp

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.

Published: 2013-09-30 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4623 is rated Exploit Available (55.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.66%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-4623

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-4623

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 1.23% 0.66% -0.57%
2 2025-03-29 0.66% 1.23% +0.57%
3 2025-03-17 — 0.66% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4623

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2013-4623

OS Trackers for CVE-2013-4623

vendor priority summary link
gentoo normal CVE-2013-4623: 1 GLSA(s) (201310-10), 1 atom(s) (net-libs/polarssl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-4623
ubuntu medium CVE-2013-4623 medium priority: Ubuntu including 2 source packages (mbedtls, polarssl), 20 status rows across 13 suites (lucid, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 7, not-affected 7, ignored 4, released 2. https://ubuntu.com/security/CVE-2013-4623

Affected software / configurations for CVE-2013-4623

Vendor Product Version Raw CPE
polarssl polarssl 1.1.0 cpe:2.3:a:polarssl:polarssl:1.1.0:*:*:*:*:*:*:*
polarssl polarssl 1.1.0 cpe:2.3:a:polarssl:polarssl:1.1.0:rc0:*:*:*:*:*:*
polarssl polarssl 1.1.0 cpe:2.3:a:polarssl:polarssl:1.1.0:rc1:*:*:*:*:*:*
polarssl polarssl 1.1.1 cpe:2.3:a:polarssl:polarssl:1.1.1:*:*:*:*:*:*:*
polarssl polarssl 1.1.2 cpe:2.3:a:polarssl:polarssl:1.1.2:*:*:*:*:*:*:*
polarssl polarssl 1.1.3 cpe:2.3:a:polarssl:polarssl:1.1.3:*:*:*:*:*:*:*
polarssl polarssl 1.1.4 cpe:2.3:a:polarssl:polarssl:1.1.4:*:*:*:*:*:*:*
polarssl polarssl 1.1.5 cpe:2.3:a:polarssl:polarssl:1.1.5:*:*:*:*:*:*:*
polarssl polarssl 1.1.6 cpe:2.3:a:polarssl:polarssl:1.1.6:*:*:*:*:*:*:*
polarssl polarssl 1.2.0 cpe:2.3:a:polarssl:polarssl:1.2.0:*:*:*:*:*:*:*
polarssl polarssl 1.2.1 cpe:2.3:a:polarssl:polarssl:1.2.1:*:*:*:*:*:*:*
polarssl polarssl 1.2.2 cpe:2.3:a:polarssl:polarssl:1.2.2:*:*:*:*:*:*:*
polarssl polarssl 1.2.3 cpe:2.3:a:polarssl:polarssl:1.2.3:*:*:*:*:*:*:*
polarssl polarssl 1.2.4 cpe:2.3:a:polarssl:polarssl:1.2.4:*:*:*:*:*:*:*
polarssl polarssl 1.2.5 cpe:2.3:a:polarssl:polarssl:1.2.5:*:*:*:*:*:*:*
polarssl polarssl 1.2.6 cpe:2.3:a:polarssl:polarssl:1.2.6:*:*:*:*:*:*:*
polarssl polarssl 1.2.7 cpe:2.3:a:polarssl:polarssl:1.2.7:*:*:*:*:*:*:*

References for CVE-2013-4623

cvelogic Threat Intelligence