HOME VULNERABILITIESCVE-2009-3767

MEDIUM

CVE-2009-3767

CWE-295Published: October 23, 2009· Updated: Jun 16, 2026

4.3

CVSS v3.1

Official 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.

Technical Analysis

CVE-2009-3767 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityM

Privileges Req.

User Interaction

Scope

Impact

ConfidentialityNone

IntegrityP

AvailabilityNone

AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected Vendors & Products

Apple1 product(s)

mac os x

Fedora1 product(s)

fedora

openldap1 product(s)

openldap

OpenSSL1 product(s)

openssl

Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=h

PATCHhttp://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=h

ADVISORYhttp://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html

ADVISORYhttp://marc.info/?l=oss-security&m=125198917018936&w=2

ADVISORYhttp://marc.info/?l=oss-security&m=125369675820512&w=2

ADVISORYhttp://secunia.com/advisories/38769

ADVISORYhttp://secunia.com/advisories/40677

ADVISORYhttp://security.gentoo.org/glsa/glsa-201406-36.xml

ADVISORYhttp://www.redhat.com/support/errata/RHSA-2010-0543.html

ADVISORYhttp://www.redhat.com/support/errata/RHSA-2011-0896.html

ADVISORYhttp://www.vupen.com/english/advisories/2009/3056

ADVISORYhttp://www.vupen.com/english/advisories/2010/1858

ADVISORYhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178

ADVISORYhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7274

ADVISORYhttp://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html

ADVISORYhttp://marc.info/?l=oss-security&m=125198917018936&w=2

ADVISORYhttp://marc.info/?l=oss-security&m=125369675820512&w=2

ADVISORYhttp://secunia.com/advisories/38769

ADVISORYhttp://secunia.com/advisories/40677

ADVISORYhttp://security.gentoo.org/glsa/glsa-201406-36.xml

ADVISORYhttp://www.redhat.com/support/errata/RHSA-2010-0543.html

ADVISORYhttp://www.redhat.com/support/errata/RHSA-2011-0896.html

ADVISORYhttp://www.vupen.com/english/advisories/2009/3056

ADVISORYhttp://www.vupen.com/english/advisories/2010/1858

ADVISORYhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178

ADVISORYhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7274

All References (32)

→

http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.htmlMailing List · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.htmlThird Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.htmlMailing List · Third Party Advisory

→

http://marc.info/?l=oss-security&m=125198917018936&w=2Third Party Advisory

→

http://marc.info/?l=oss-security&m=125369675820512&w=2Third Party Advisory

→

http://secunia.com/advisories/38769Third Party Advisory

→

http://secunia.com/advisories/40677Third Party Advisory

→

http://security.gentoo.org/glsa/glsa-201406-36.xmlThird Party Advisory

→

http://support.apple.com/kb/HT3937Broken Link

→

http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=hPatch · Vendor Advisory

→

http://www.redhat.com/support/errata/RHSA-2010-0543.htmlThird Party Advisory

→

http://www.redhat.com/support/errata/RHSA-2011-0896.htmlThird Party Advisory

→

http://www.vupen.com/english/advisories/2009/3056Third Party Advisory

→

http://www.vupen.com/english/advisories/2010/1858Third Party Advisory

→

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178Third Party Advisory

Quick Facts

CVE IDCVE-2009-3767

CVSS Score4.3 / 10

SeverityMEDIUM

WeaknessCWE-295

CISA KEVNo

Affected4 vendor(s)

PublishedOct 23, 2009

Related CVEs (CWE-295)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2009-3767 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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