CVE-2013-4566 : mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vh

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.

Published 2013-12-12 18:55:11

Updated 2025-04-11 00:51:22

Source Red Hat, Inc.

View at NVD, CVE.org

Products affected by CVE-2013-4566

Redhat » Enterprise Linux » Version: 6.0
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux » Version: 5
cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss
Versions up to, including, (<=) 1.0.8
cpe:2.3:a:mod_nss_project:mod_nss:*:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0.5
cpe:2.3:a:mod_nss_project:mod_nss:1.0.5:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0.4
cpe:2.3:a:mod_nss_project:mod_nss:1.0.4:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0.3
cpe:2.3:a:mod_nss_project:mod_nss:1.0.3:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0.2
cpe:2.3:a:mod_nss_project:mod_nss:1.0.2:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0
cpe:2.3:a:mod_nss_project:mod_nss:1.0:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0.7
cpe:2.3:a:mod_nss_project:mod_nss:1.0.7:*:*:*:*:*:*:*
Matching versions
Mod Nss Project » Mod Nss » Version: 1.0.6
cpe:2.3:a:mod_nss_project:mod_nss:1.0.6:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2013-4566

Top countries where our scanners detected CVE-2013-4566

Top open port discovered on systems with this issue 53

IPs affected by CVE-2013-4566 21,850

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2013-4566!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2013-4566

EPSS FAQ

0.12%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 28 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2013-4566

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
4.0	MEDIUM	AV:N/AC:H/Au:N/C:P/I:P/A:N	4.9	4.9	NIST
Access Vector: Network Access Complexity: High Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None

CWE ids for CVE-2013-4566

CWE-264

Assigned by: nvd@nist.gov (Primary)

References for CVE-2013-4566

https://bugzilla.redhat.com/show_bug.cgi?id=1016832

1016832 – (CVE-2013-4566) CVE-2013-4566 mod_nss: incorrect handling of NSSVerifyClient in directory context
http://lists.opensuse.org/opensuse-updates/2013-12/msg00118.html

openSUSE-SU-2013:1956-1: moderate: update for apache2-mod_nss
http://rhn.redhat.com/errata/RHSA-2013-1779.html

RHSA-2013:1779 - Security Advisory - Red Hat Customer Portal