Home/CVE/chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy
CVE

CVE-2011-1024

chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy

chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server.

MEDIUM · CVSS 4.6 EPSS 0.00247
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
▤

Affected Products & Versions

1
openldapall versions
▣

Scoring & Timeline

4.6
MEDIUM · CVSS v2 (legacy) · secalert@redhat.com
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:H/Au:S/C:P/I:P/A:P
Published to NVD20 Mar 2011 · 02:00 AM
⚑

Vendor Advisories

3
usnUSN-1100-1
rhsaRHSA-2011:0347Moderate
rhsaRHSA-2011:0346Moderate
🔗

References & Sources

21
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735
http://openwall.com/lists/oss-security/2011/02/24/12
http://openwall.com/lists/oss-security/2011/02/25/13
http://secunia.com/advisories/43331Vendor Advisory
http://secunia.com/advisories/43708
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin