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CVE-2011-0438

21
FAUCET Score

CVE-2011-0438 describes a vulnerability in the nss-pam-ldapd 0.8.0 PAM module, specifically within nslcd/pam.c, where it erroneously returns a success code even when a user is not found in LDAP. This flaw allows remote attackers to bypass authentication mechanisms. The vulnerability carries a CVSS score of 6.8, indicating a medium severity with network access, medium attack complexity, and potential for partial confidentiality, integrity, and availability impact. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the vulnerability is categorized under CWE-287 (Improper Authentication).

Impacted Technologies

VendorProductVersion(s)CPE
0.8.0CPE matchmatch criteria
cpe:2.3:a:arthurdejong:nss-pam-ldapd:0.8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 47th percentile among its peer group of 19,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

arthurdejong.org / nss-pam-ldapd/news.html
lists.arthurdejong.org / nss-pam-ldapd-announce/2011/attachments/txtVf3rHgt8qQ.txt
Patch
lists.arthurdejong.org / nss-pam-ldapd-announce/2011/msg00000.html
PatchVendor Advisory
securityreason.com / securityalert/8132
exchange.xforce.ibmcloud.com / vulnerabilities/66028
securityfocus.com / bid/46819
Patch