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CVE-2013-6422: canonical ubuntu_linux Improper Input Validation

CVSS: 4.0v2.0MediumModified
AliasesDEBIAN-CVE-2013-6422DSA-2824-1
Published 23-12-2013Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-6422 is a medium (CVSS 4.0) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 2.80% chance of exploitation in the next 30 days, higher than 86.2% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.0/10
010
Medium · v2.0 (NVD)
EPSS score
2.80%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 23-12-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.80%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

0.00 pp

From 2.80% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Canonical1 product
Haxx1 product
  • libcurl7.21.4 | 7.21.5 | 7.21.6 | 7.21.7 | 7.22.0 | 7.23.0 | 7.23.1 | 7.24.0 | 7.25.0 | 7.26.0 | 7.27.0 | 7.28.0 | 7.28.1 | 7.29.0 | 7.30.0 | 7.31.0 | 7.32.0 | 7.33.0

3 vendors · 4 products

References

6 links