CVE-2009-4565
sendmail before 8.14.4 does not properly handle a '\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-310
- EPSS score
- 2.4% (84th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-4531)
- Published
- January 4, 2010
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-4531 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
- sendmail / sendmail
and 12 more…
References
- http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
- http://marc.info/?l=bugtraq&m=126953289726317&w=2
- http://secunia.com/advisories/37998(Vendor Advisory)
- http://secunia.com/advisories/38314
- http://secunia.com/advisories/38915
- http://secunia.com/advisories/39088
- http://secunia.com/advisories/40109
- http://secunia.com/advisories/43366
- http://security.gentoo.org/glsa/glsa-201206-30.xml
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021797.1-1
- http://www.debian.org/security/2010/dsa-1985
- http://www.redhat.com/support/errata/RHSA-2011-0262.html
- http://www.securityfocus.com/bid/37543
- http://www.sendmail.org/releases/8.14.4(Patch)
- http://www.vupen.com/english/advisories/2009/3661(Patch, Vendor Advisory)
- http://www.vupen.com/english/advisories/2010/0719
- http://www.vupen.com/english/advisories/2010/1386
- http://www.vupen.com/english/advisories/2011/0415
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10255
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11822
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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