Race condition in nss_ldap, when used in applications that are linked against the pthread library and fork after a call to nss_ldap, might s
Race condition in nss_ldap, when used in applications that are linked against the pthread library and fork after a call to nss_ldap, might send user data to the wrong process because of improper handling of the LDAP connection. NOTE: this issue was originally reported for Dovecot with the wrong mailboxes being returned, but other applications might also be affected.
- Published
- Nov 13, 2007
- Updated
- Jun 16, 2026
- EPSS
- 1.2% · 66th percentile
- CWE
- CWE-362
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Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.2%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| nss ldap | nss ldap | cpe:2.3:a:nss_ldap:nss_ldap |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- nss ldap nss ldapall versions
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:11 | libnss-ldap | before 256-1 | 256-1 |
| Debian:3.1 | libnss-ldap | before 238-1sarge1 | 238-1sarge1 |
| Debian:4.0 | libnss-ldap | before 251-7.5etch1 | 251-7.5etch1 |
| Red Hat:enterprise_linux:4::as | nss_ldap | before 0:253-5.el4 | 0:253-5.el4 |
| Red Hat:enterprise_linux:4::as | nss_ldap-debuginfo | before 0:253-5.el4 | 0:253-5.el4 |
| Red Hat:enterprise_linux:5::client | nss_ldap | before 0:253-12.el5 | 0:253-12.el5 |
| Red Hat:enterprise_linux:5::client | nss_ldap-debuginfo | before 0:253-12.el5 | 0:253-12.el5 |
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:libnss-ldap | 256-1 · Debian:11 | Package registry (OSV) |
| red hat:nss_ldap | 0:253-12.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:nss_ldap-debuginfo | 0:253-12.el5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- P · data can be read
- Integrity
- none
- Availability
- none
- Attack complexity
- M
- Confidentiality impact
- P
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
AV:N/AC:M/Au:N/C:P/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=453868
- bugs.gentoo.org/show_bug.cgi?id=198390
- lists.opensuse.org/opensuse-security-announce/2008-02/msg00003.html
- secunia.com/advisories/27670
- secunia.com/advisories/27768
- secunia.com/advisories/27839
- secunia.com/advisories/28061
- secunia.com/advisories/28838
- secunia.com/advisories/29083
- secunia.com/advisories/30352
- secunia.com/advisories/31227
- secunia.com/advisories/31524
- security.gentoo.org/glsa/glsa-200711-33.xml
- support.avaya.com/elmodocs2/security/ASA-2008-332.htm
- wiki.rpath.com/wiki/Advisories:rPSA-2007-0255
- www.debian.org/security/2007/dsa-1430
- www.dovecot.org/list/dovecot/2005-April/006859.html
- www.dovecot.org/list/dovecot/2005-March/006345.html
- www.mandriva.com/security/advisories?name=MDVSA-2008:049
- www.redhat.com/support/errata/RHSA-2008-0389.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.