CVE-2013-4238: canonical ubuntu_linux Improper Input Validation

Modified

AliasesMGASA-2013-0250RHSA-2013:1582DEBIAN-CVE-2013-4238

Published 18-08-2013Last modified 06-08-2024

Vulnerability summary

CVE-2013-4238 is a medium (CVSS 4.3) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 5.35% chance of exploitation in the next 30 days, higher than 92.6% of scored vulnerabilities.

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

5.35%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

18-08-2013
PublishedVulnerability first disclosed.
06-08-2024
Last modifiedVulnerability information updated.

Description

The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

CVSS metrics

1 score · 1 source · 1 version

v2.04.3

EPSS trend

Probability

5.35%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

No change 0.00 pp

From 5.35% 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

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected systems

Version check

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

Redhat7 products

python< 0:2.6.6-51.el6
python-debuginfo< 0:2.6.6-51.el6
python-devel< 0:2.6.6-51.el6
python-libs< 0:2.6.6-51.el6
python-test< 0:2.6.6-51.el6

Show all 7

Mageia2 products

python< 2.7.3-2.4.mga2
python< 2.7.5-1.2.mga3

Canonical1 product

ubuntu_linuxEOL10.04

Debian1 product

python2.7< 2.7.5-8

Opensuse1 product

opensuseEOL11.4 | 12.2 | 12.3

Python1 product

pythonEOL2.6.1 | 2.6.2 | 2.6.3 | 2.6.4 | 2.6.5 | 2.6.6 | 2.6.7 | 2.6.8 | 2.6.2150 | 2.6.6150 | 2.7.1 | 2.7.1:rc1 | 2.7.2:rc1 | 2.7.3 | 2.7.1150 | 2.7.2150 | 3.0 | 3.0.1 | 3.1 | 3.1.1 | 3.1.2 | 3.1.3 | 3.1.4 | 3.1.5 | 3.1.2150 | 3.2 | 3.2:alpha | 3.2.3 | 3.2.2150 | 3.3 | 3.3:beta2 | 3.4:alpha1

6 vendors · 13 products