CVE-2011-1024
MEDIUM · CVSS 4.6EPSS 2.6%EU EUVD
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.
Key facts
- CVSS score
- 4.6 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:H/Au:S/C:P/I:P/A:P- Weakness (CWE)
- CWE-264
- EPSS score
- 2.6% (85th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1041)
- Published
- March 20, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1041 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
- openldap / openldap
References
- 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/43331(Vendor Advisory)
- http://secunia.com/advisories/43708
- http://secunia.com/advisories/43718
- http://security.gentoo.org/glsa/glsa-201406-36.xml
- http://securitytracker.com/id?1025188
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:055
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:056
- http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-ldap/chain.c.diff?r1=1.76&r2=1.77&hideattic=1&sortbydate=0(Patch)
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6607
- http://www.openldap.org/lists/openldap-announce/201102/msg00000.html(Patch)
- http://www.openldap.org/lists/openldap-technical/201004/msg00247.html
- http://www.redhat.com/support/errata/RHSA-2011-0346.html
- http://www.redhat.com/support/errata/RHSA-2011-0347.html
- http://www.ubuntu.com/usn/USN-1100-1
- http://www.vupen.com/english/advisories/2011/0665(Vendor Advisory)
- https://bugzilla.novell.com/show_bug.cgi?id=674985
- https://bugzilla.redhat.com/show_bug.cgi?id=680466
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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