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CVE-2009-4034

PostgreSQL 7.4.x before 7.4.27, 8.0.x before 8.0.23, 8.1.x before 8.1.19, 8.2.x before 8.2.15, 8.3.x before 8.3.9, and 8.4.x before 8.4.2 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 (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based PostgreSQL servers via a crafted server certificate issued by…

Severity
Medium 5.8
Published
15 Dec 2009
Last changed
16 Jun 2026
Added to UpHeron
16 Oct 2026
Exploit chance
2.1% in the next 30 daysHigher than 82% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-310
Attack
Over the network · No login needed
Attacker can
Change some data · Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:P
Sources
NVD

Description

PostgreSQL 7.4.x before 7.4.27, 8.0.x before 8.0.23, 8.1.x before 8.1.19, 8.2.x before 8.2.15, 8.3.x before 8.3.9, and 8.4.x before 8.4.2 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 (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based PostgreSQL servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended client-hostname restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

From NVD.

Affected software

SoftwareAffected versions
PostgreSQLServers and applications · cpe:a:postgresql:postgresql
  • Version 8.4.1
  • Version 8.3.8
  • Version 8.3.7
  • Version 8.3.6
All 92 release lines
  • Version 7.4.1
  • Version 7.4.2
  • Version 7.4.3
  • Version 7.4.4
  • Version 7.4.5
  • Version 7.4.6
  • Version 7.4.7
  • Version 7.4.8
  • Version 7.4.9
  • Version 7.4.10
  • Version 7.4.11
  • Version 7.4.12
  • Version 7.4.13
  • Version 7.4.14
  • Version 7.4.15
  • Version 7.4.16
  • Version 7.4.17
  • Version 7.4.18
  • Version 7.4.19
  • Version 7.4.20
  • Version 7.4.21
  • Version 7.4.22
  • Version 7.4.23
  • Version 7.4.24
  • Version 7.4.25
  • Version 7.4.26
  • Version 8.0.0
  • Version 8.0.1
  • Version 8.0.2
  • Version 8.0.3
  • Version 8.0.4
  • Version 8.0.5
  • Version 8.0.6
  • Version 8.0.7
  • Version 8.0.8
  • Version 8.0.9
  • Version 8.0.10
  • Version 8.0.11
  • Version 8.0.12
  • Version 8.0.13
  • Version 8.0.14
  • Version 8.0.15
  • Version 8.0.16
  • Version 8.0.17
  • Version 8.0.18
  • Version 8.0.19
  • Version 8.0.20
  • Version 8.0.21
  • Version 8.0.22
  • Version 8.1.0
  • Version 8.1.1
  • Version 8.1.2
  • Version 8.1.3
  • Version 8.1.4
  • Version 8.1.5
  • Version 8.1.6
  • Version 8.1.7
  • Version 8.1.8
  • Version 8.1.9
  • Version 8.1.10
  • Version 8.1.11
  • Version 8.1.12
  • Version 8.1.13
  • Version 8.1.14
  • Version 8.1.15
  • Version 8.1.16
  • Version 8.1.17
  • Version 8.1.18
  • Version 8.2
  • Version 8.2.1
  • Version 8.2.2
  • Version 8.2.3
  • Version 8.2.4
  • Version 8.2.5
  • Version 8.2.6
  • Version 8.2.7
  • Version 8.2.8
  • Version 8.2.9
  • Version 8.2.10
  • Version 8.2.11
  • Version 8.2.12
  • Version 8.2.13
  • Version 8.2.14
  • Version 8.3.1
  • Version 8.3.2
  • Version 8.3.3
  • Version 8.3.4
  • Version 8.3.5
  • Version 8.3.6
  • Version 8.3.7
  • Version 8.3.8
  • Version 8.4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-4034
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-4034