4.3

CVE-2013-4623: polarssl Improper Input Validation

Modified
AliasesUBUNTU-CVE-2013-4623
Published 30-09-2013Last modified 06-08-2024

Vulnerability summary

CVE-2013-4623 is a medium (CVSS 4.3) Improper Input Validation vulnerability in polarssl. EPSS estimates a 1.89% chance of exploitation in the next 30 days, higher than 79.5% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v2.0 (NVD)
EPSS score
1.89%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2
DSA-2782-1MGASA-2013-0290

Timeline

  1. 30-09-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

1.89%

Chance of exploitation in the next 30 days

Percentile

80%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.89% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Polarssl

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Polarssl1 product
  • polarssl1.1.0 | 1.1.0:rc0 | 1.1.0:rc1 | 1.1.1 | 1.1.2 | 1.1.3 | 1.1.4 | 1.1.5 | 1.1.6 | 1.2.0 | 1.2.1 | 1.2.2 | 1.2.3 | 1.2.4 | 1.2.5 | 1.2.6 | 1.2.7
Ubuntu1 product
  • polarssl< 1.2.8-2

2 vendors · 2 products

References

10 links