OpenLDAP: Doesn't properly handle NULL character in subject Common Name
Published Oct 23, 2009
4.3
MEDIUMCVSS 2.0
EPSS 3.27%
Description
libraries/libldap/tls_o.c in OpenLDAP 2.2 and 2.4, and possibly other versions, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Affected products
No data.
No data.
Red Hat Enterprise Linux 4
openldap-0:2.2.13-12.el4_8.3
Fixed · RHSA-2010:0543
Red Hat Enterprise Linux 5
openldap-0:2.3.43-12.el5
Fixed · RHSA-2010:0198
Red Hat JBoss Web Server 1.0
n/a
Fixed · RHSA-2011:0896
Red Hat Enterprise Linux 6
openldap
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | openldap-0:2.2.13-12.el4_8.3 | Fixed | RHSA-2010:0543 |
| Red Hat Enterprise Linux 5 | openldap-0:2.3.43-12.el5 | Fixed | RHSA-2010:0198 |
| Red Hat JBoss Web Server 1.0 | n/a | Fixed | RHSA-2011:0896 |
| Red Hat Enterprise Linux 6 | openldap | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue was addressed in the openldap packages as shipped with Red Hat Enterprise Linux 5 and 4 via: https://rhn.redhat.com/errata/RHSA-2010-0198.html and https://rhn.redhat.com/errata/RHSA-2010-0543.html respectively. The Red Hat Security Response Team has rated this issue as having moderate security impact, a future openldap update may address this flaw in Red Hat Enterprise Linux 3.
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:M/Au:N/C:N/I:P/A:N
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.27% (0.03273) | 88.01th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.09% (0.03094) | 85.99th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.93% (0.01930) | 81.74th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.63% (0.07631) | 86.17th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.98% (0.01983) | 82.39th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.26% (0.00261) | 66.35th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.26% (0.00261) | 64.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00261) | 61.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (20)
- http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html vendor-advisoryx_refsource_APPLEMailing ListThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://marc.info/?l=oss-security&m=125198917018936&w=2 mailing-listx_refsource_MLISTThird Party Advisory
- http://marc.info/?l=oss-security&m=125369675820512&w=2 mailing-listx_refsource_MLISTThird Party Advisory
- http://secunia.com/advisories/38769 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/40677 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://security.gentoo.org/glsa/glsa-201406-36.xml vendor-advisoryx_refsource_GENTOOThird Party Advisory
- http://support.apple.com/kb/HT3937 x_refsource_CONFIRMBroken Link
- http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=h x_refsource_CONFIRMPatchVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2010-0543.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.redhat.com/support/errata/RHSA-2011-0896.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.vupen.com/english/advisories/2009/3056 vdb-entryx_refsource_VUPENThird Party Advisory
- http://www.vupen.com/english/advisories/2010/1858 vdb-entryx_refsource_VUPENThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2009-3767 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=530715 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-3767
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7274 vdb-entrysignaturex_refsource_OVALThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2009-3767
Change history (0)
No recorded changes yet.