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TI-2013-04011 Aliases CVE-2013-4566GHSA-c4hv-94wj-93p7

mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vhost…

Priority LOW 23CWE-264Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
Partial · Partial · None
Fix status
Partial Red Hat: 6 fixed, 2 without a fix

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-264.

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.

Why it matters now

EPSS 0.01949 80th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 6 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:mod_nss_project:mod_nss:*:*:*:*:*:*:*:*up to 1.0.8VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0:*:*:*:*:*:*:*1.0VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0.2:*:*:*:*:*:*:*1.0.2VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0.3:*:*:*:*:*:*:*1.0.3VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0.4:*:*:*:*:*:*:*1.0.4VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0.5:*:*:*:*:*:*:*1.0.5VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0.6:*:*:*:*:*:*:*1.0.6VulnerableMod Nss Project
cpe:2.3:a:mod_nss_project:mod_nss:1.0.7:*:*:*:*:*:*:*1.0.7VulnerableMod Nss Project
cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:*5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
  • cpe:2.3:a:mod_nss_project:mod_nss:*:*:*:*:*:*:*:* Versions up to 1.0.8 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0.3:*:*:*:*:*:*:* Versions 1.0.3 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0.4:*:*:*:*:*:*:* Versions 1.0.4 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0.5:*:*:*:*:*:*:* Versions 1.0.5 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0.6:*:*:*:*:*:*:* Versions 1.0.6 Vulnerable ·Mod Nss Project
  • cpe:2.3:a:mod_nss_project:mod_nss:1.0.7:*:*:*:*:*:*:* Versions 1.0.7 Vulnerable ·Mod Nss Project
  • cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:* Versions 5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat

Remediation

Red Hat 1 advisory

  • RHSA-2013:1779 Released 2013-12-03 · Red Hat rating Moderate
    mod_nss security update
    • Red Hat Enterprise Linux (v. 5 server) mod_nss-1.0.8-8.el5_10, mod_nss-1.0.8-8.el5_10.i386, mod_nss-1.0.8-8.el5_10.ia64 +1
    • Red Hat Enterprise Linux Desktop (v. 5 client) mod_nss-1.0.8-8.el5_10, mod_nss-1.0.8-8.el5_10.i386
    • 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

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Certificate System 8AffectedNo fix planned: Will not fix
Red Hat Directory Server 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2013:1779
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2013:1779
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2013:1779
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2013:1779
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2013:1779
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2013:1779
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2013-4566
  2. 2026-10-03 Alias added: GHSA-c4hv-94wj-93p7

References

Advisory 2

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences