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Fencer Intel
medium 4.3

CVE-2014-8155 json

GnuTLS before 2.9.10 does not verify the activation and expiration dates of CA certificates, which allows man-in-the-middle attackers to sp…

published 2015-08-14 11 y ago modified 2026-06-17 4 mo ago also EUVD-2014-7996

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

GnuTLS before 2.9.10 does not verify the activation and expiration dates of CA certificates, which allows man-in-the-middle attackers to spoof servers via a certificate issued by a CA certificate that is (1) not yet valid or (2) no longer valid.

Patch / fix

  • gnutls RHEL 6 2.8.5-18.el6
  • gnutls-guile RHEL 6 2.8.5-18.el6
  • gnutls-utils RHEL 6 2.8.5-18.el6

red hat advisories RHSA-2015:1457

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-2014-8155 updated cvss 4.3

gnutls: gnutls does not perform date/time checks on CA certificates

  • Red Hat Enterprise Linux 5 gnutls
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Desktop (v. 6) gnutls 2.8.5-18.el6, gnutls-utils 2.8.5-18.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) gnutls-guile 2.8.5-18.el6 Red Hat Enterprise Linux HPC Node (v. 6) gnutls 2.8.5-18.el6, gnutls-utils 2.8.5-18.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) gnutls-guile 2.8.5-18.el6 Red Hat Enterprise Linux Server (v. 6) gnutls 2.8.5-18.el6, gnutls-utils 2.8.5-18.el6 Red Hat Enterprise Linux Server Optional (v. 6) gnutls-guile 2.8.5-18.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) gnutls 2.8.5-18.el6, gnutls-utils 2.8.5-18.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) gnutls-guile 2.8.5-18.el6
    fixed: vendor fix RHSA-2015:1457
  • Red Hat Enterprise Linux 7 gnutls, gnutls-c++, gnutls-dane, gnutls-utils
    not affected: vulnerable code not present

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 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

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.