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Fencer Intel
medium 5.8

CVE-2013-6444 json

PyWBEM TOCTOU vulnerability in certificate validation

published 2014-05-05 12 y ago modified 2026-06-17 4 mo ago also GHSA-gh2c-6m38-c78j , PYSEC-2014-94 , EUVD-2014-0095

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

PyWBEM 0.7 and earlier does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

Patch / fix

  • pypi pywbem 0.8.1
  • pywbem Ubuntu 14.04 LTS 0.7.0-4ubuntu1~14.04.1
  • pywbem Ubuntu 18.04 LTS, Ubuntu 16.04 LTS 0.8.0~dev650-1

ubuntu advisories UBUNTU-CVE-2013-6444

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-6444 updated cvss 5.8

pywbem: failure to check certificate hostname

  • Red Hat Enterprise Linux 6 pywbem Red Hat Enterprise Linux 7 pywbem
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected packages

ecosystem package affected fixed in
pypi pywbem
<0.8.1
0.8.1

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.