CVE catalog

CVE-2009-4565

sendmail: CVE-2009-4565

Severity: High
Published: Jan 4, 2010, 9:30:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.40% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	sendmail	sid	`8.18.2-2`	fixed
Debian	sendmail	forky	`8.18.2-2`	fixed
Debian	sendmail	trixie	`8.18.1-6`	fixed
Debian	sendmail	bookworm	`8.17.1.9-2+deb12u2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	sendmail	source	sid	`8.14.3-9.1`	medium	Not reported	[564581]
Debian	sendmail	source	forky	`8.14.3-9.1`	medium	Not reported	[564581]
Debian	sendmail	source	trixie	`8.14.3-9.1`	medium	Not reported	[564581]
Debian	sendmail	source	bookworm	`8.14.3-9.1`	medium	Not reported	[564581]

[Debian bug #564581]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libmilter1.0.1]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[libmilter-dev]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[rmail]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[sendmail]Fixed
Details (4)
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[sendmail-base]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[sendmail-bin]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[sendmail-cf]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[sendmail-doc]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · all · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
[sensible-mda]Fixed
Source package: [sendmail]
Details (4)
- 8.17.1.9-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.17.1.9-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12
- 8.18.1-6~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · bookworm; dsa · sendmail · debian · 12

[Debian 13 (Trixie)]

[libmilter1.0.1]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6+b1 · amd64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6+b1 · arm64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[libmilter-dev]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6+b1 · amd64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6+b1 · arm64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[rmail]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6+b1 · amd64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6+b1 · arm64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[sendmail]Fixed
Details (2)
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[sendmail-base]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[sendmail-bin]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6+b1 · amd64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6+b1 · arm64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[sendmail-cf]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[sendmail-doc]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6 · all · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
[sensible-mda]Fixed
Source package: [sendmail]
Details (2)
- 8.18.1-6+b1 · amd64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13
- 8.18.1-6+b1 · arm64 · trixie
  Fixed · Fixed: 8.14.3-9.1
  dsa · sendmail · debian · 13

Observed: Oct 23, 2026, 5:04:45 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]