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Fencer Intel
medium 4.0

CVE-2013-4566 json

mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vhost context, does not enforce the NSSVerifyClient setting i…

published 12y ago modified 4mo ago also EUVD-2013-4424

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vhost context, does not enforce the NSSVerifyClient setting in the directory context, which allows remote attackers to bypass intended access restrictions.

Patch / fix

  • mod_nss RHEL 5 1.0.8-8.el5_10
  • mod_nss RHEL 6 1.0.8-19.el6_5

red hat advisories RHSA-2013:1779

  • apache2-mod_nss SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +6 more 1.0.14-0.4.25.1
  • apache2-mod_nss SLES for SAP 12 SP1, SLES 12 SP1 1.0.14-18.3
  • apache2-mod_nss SLES for SAP 12, SLES 12-LTSS 1.0.14-10.14.3

suse advisories SUSE-SU-2016:2396-1SUSE-SU-2016:2329-1SUSE-SU-2016:2285-1

  • apache2-mod_nss openSUSE Tumbleweed 1.0.14-4.1

opensuse advisories openSUSE-SU-2024:10311-1

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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-2013-4566 updated cvss 4.0

mod_nss: incorrect handling of NSSVerifyClient in directory context

  • Red Hat Certificate System 8 mod_nss Red Hat Directory Server 8 fortitude-mod_nss
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) mod_nss 1.0.8-8.el5_10 Red Hat Enterprise Linux Desktop (v. 5 client) mod_nss 1.0.8-8.el5_10 Red Hat Enterprise Linux Desktop Optional (v. 6) mod_nss 1.0.8-19.el6_5 Red Hat Enterprise Linux HPC Node Optional (v. 6) mod_nss 1.0.8-19.el6_5 Red Hat Enterprise Linux Server (v. 6) mod_nss 1.0.8-19.el6_5 Red Hat Enterprise Linux Workstation (v. 6) mod_nss 1.0.8-19.el6_5
    fixed: vendor fix RHSA-2013:1779
  • Red Hat Enterprise Linux 7 mod_nss
    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

1.95% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:N/AC:H/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

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.