pam_ldap in nss_ldap on Red Hat Enterprise Linux 4, Fedora Core 3 and earlier, and…
Priority MEDIUM 40CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
pam_ldap in nss_ldap on Red Hat Enterprise Linux 4, Fedora Core 3 and earlier, and possibly other distributions does not return an error condition when an LDAP directory server responds with a PasswordPolicyResponse control response, which causes the pam_authenticate function to return a success code even if authentication has failed, as originally reported for xscreensaver.
Why it matters now
EPSS 0.04146 90th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:fedoraproject:fedora_core:*:*:*:*:*:*:*:* | up to core_3.0 | Vulnerable | Fedoraproject |
| cpe:2.3:o:redhat:enterprise_linux:4.0:*:linux_kernel_2.6.9:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:4.0_s390:*:*:*:*:*:*:* | 4.0_s390 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:4.0_s390x:*:*:*:*:*:*:* | 4.0_s390x | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:* | 3.1 | Vulnerable | Debian |
- cpe:2.3:o:fedoraproject:fedora_core:*:*:*:*:*:*:*:* Versions up to core_3.0 Vulnerable ·Fedoraproject
- cpe:2.3:o:redhat:enterprise_linux:4.0:*:linux_kernel_2.6.9:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:4.0_s390:*:*:*:*:*:*:* Versions 4.0_s390 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:4.0_s390x:*:*:*:*:*:*:* Versions 4.0_s390x Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·Debian
Remediation
Red Hat 1 advisory
- RHSA-2006:0719 Released 2006-11-15 · Red Hat rating Moderatenss_ldap security update
- Red Hat Enterprise Linux AS version 4 nss_ldap-226-17, nss_ldap-226-17.i386, nss_ldap-226-17.ia64 +1
- Red Hat Enterprise Linux Desktop version 4 nss_ldap-226-17, nss_ldap-226-17.i386
- Red Hat Enterprise Linux ES version 4 nss_ldap-226-17, nss_ldap-226-17.i386, nss_ldap-226-17.ia64
- Red Hat Enterprise Linux WS version 4 nss_ldap-226-17, nss_ldap-226-17.i386, nss_ldap-226-17.ia64
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AS version 4 | Fixed | RHSA-2006:0719 |
| Red Hat Enterprise Linux Desktop version 4 | Fixed | RHSA-2006:0719 |
| Red Hat Enterprise Linux ES version 4 | Fixed | RHSA-2006:0719 |
| Red Hat Enterprise Linux WS version 4 | Fixed | RHSA-2006:0719 |
Timeline
- 2026-10-02 Threatist record created from CVE-2006-5170
- 2026-10-03 Alias added: GHSA-3mcc-2cg8-vvjx
References
Sources
- CVE-2006-5170 · CVE Program
- CVE-2006-5170 · NVD
- FIRST EPSS
- GHSA-3mcc-2cg8-vvjx · GitHub Advisory Database · CC BY 4.0
- CVE-2006-5170 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences