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…
- 7.5HighCVSS base score
- 2.4%Exploitation in 30 daysEPSS · top 16% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By mitre
Published
- 15 years later
· 15 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
20
- 38314 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- GLSA-201206-30 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 1021797 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
- 39088 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2009-3661 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 37998 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 37543 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- ADV-2011-0415 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 43366 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SUSE-SR:2010:006 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- oval:org.mitre.oval:def:10255 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- http://www.sendmail.org/releases/8.14.4 (opens in a new tab)x_refsource_CONFIRMx_transferred
- HPSBUX02508 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- ADV-2010-0719 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- RHSA-2011:0262 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- DSA-1985 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- oval:org.mitre.oval:def:11822 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 40109 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 38915 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2010-1386 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2009-4531 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2009-4565)Record last updated .