openldap: forwarded bind failure messages cause success
Published Mar 20, 2011
4.6
MEDIUMCVSS 2.0
EPSS 2.59%
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.
Affected products
No data.
- 2.4.6
- 2.4.7
- 2.4.8
- 2.4.9
- 2.4.10
- 2.4.11
- 2.4.12
- 2.4.13
- 2.4.14
- 2.4.15
- 2.4.16
- 2.4.17
- 2.4.18
- 2.4.19
- 2.4.20
- 2.4.21
- 2.4.22
- 2.4.23
No data.
Red Hat Enterprise Linux 5
openldap-0:2.3.43-12.el5_6.7
Fixed · RHSA-2011:0346
Red Hat Enterprise Linux 6
openldap-0:2.4.19-15.el6_0.2
Fixed · RHSA-2011:0347
Red Hat Enterprise Linux 4
openldap
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | openldap-0:2.3.43-12.el5_6.7 | Fixed | RHSA-2011:0346 |
| Red Hat Enterprise Linux 6 | openldap-0:2.4.19-15.el6_0.2 | Fixed | RHSA-2011:0347 |
| Red Hat Enterprise Linux 4 | openldap | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:H/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.59% (0.02593) | 84.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.96% (0.02959) | 85.37th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.26% (0.00261) | 47.45th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.41% (0.00413) | 74.79th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00413) | 73.29th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.41% (0.00413) | 69.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.53% (0.02528) | 81.92th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.53% (0.02528) | 80.15th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.53% (0.02528) | 58.66th | v2 (v2022.01.01) |
References (24)
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 x_refsource_CONFIRM
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735 x_refsource_CONFIRM
- http://openwall.com/lists/oss-security/2011/02/24/12 mailing-listx_refsource_MLIST
- http://openwall.com/lists/oss-security/2011/02/25/13 mailing-listx_refsource_MLIST
- http://secunia.com/advisories/43331 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/43708 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/43718 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-201406-36.xml vendor-advisoryx_refsource_GENTOO
- http://securitytracker.com/id?1025188 vdb-entryx_refsource_SECTRACK
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:055 vendor-advisoryx_refsource_MANDRIVA
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:056 vendor-advisoryx_refsource_MANDRIVA
- http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-ldap/chain.c.diff?r1=1.76&r2=1.77&hideattic=1&sortbydate=0 x_refsource_CONFIRMPatch
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6607 x_refsource_CONFIRM
- http://www.openldap.org/lists/openldap-announce/201102/msg00000.html mailing-listx_refsource_MLISTPatch
- http://www.openldap.org/lists/openldap-technical/201004/msg00247.html mailing-listx_refsource_MLIST
- http://www.redhat.com/support/errata/RHSA-2011-0346.html vendor-advisoryx_refsource_REDHAT
- http://www.redhat.com/support/errata/RHSA-2011-0347.html vendor-advisoryx_refsource_REDHAT
- http://www.ubuntu.com/usn/USN-1100-1 vendor-advisoryx_refsource_UBUNTU
- http://www.vupen.com/english/advisories/2011/0665 vdb-entryx_refsource_VUPENVendor Advisory
- https://access.redhat.com/security/cve/CVE-2011-1024 Vendor Advisory
- https://bugzilla.novell.com/show_bug.cgi?id=674985 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=680466 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-1024
- https://www.cve.org/CVERecord?id=CVE-2011-1024
Change history (0)
No recorded changes yet.