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…

Description

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.

Scores

EPSS (exploitation in 30 days)

2.6% · top 15% of all CVEs (3 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.

Weakness

• n/a
• CWE-264 (opens in a new tab)Other CVEs with CWE-264

Affected products

• n/a

  • affected n/a

References (21)

• GLSA-201406-36 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• RHSA-2011:0346 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 1025188 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 43708 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6607 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [openldap-technical] 20100429 ppolicy master/slave issue (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-ldap/chain.c.diff?r1=1.76&r2=1.77&hideattic=1&sortbydate=0 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [openldap-announce] 20110212 OpenLDAP 2.4.24 available (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• MDVSA-2011:056 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• https://bugzilla.novell.com/show_bug.cgi?id=674985 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [oss-security] 20110225 Re: CVE Request -- OpenLDAP -- two issues (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2011:0347 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 (opens in a new tab)x_refsource_CONFIRMx_transferred
• MDVSA-2011:055 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 43718 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=680466 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [oss-security] 20110224 CVE Request -- OpenLDAP -- two issues (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735 (opens in a new tab)x_refsource_CONFIRMx_transferred
• USN-1100-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• ADV-2011-0665 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 43331 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2011-1024](https://trackcve.app/badge/CVE-2011-1024.svg)](https://trackcve.app/cve/CVE-2011-1024)

Record last updated 6 Aug 2024, 22:14 UTC.