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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…

Medium5.8EPSS 2.1%
Published
Updated
Reserved
Assigned by
redhat

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.

Scores

CVSS scores of CVE-2009-4034, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified2.0Medium5.8AV:N/AC:M/Au:N/C:N/I:P/A:P
EPSS (exploitation in 30 days)
2.1% · top 18% of all CVEs (6 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.8.

Weakness

Affected products

  • n/a

    • affected n/a

References (19)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .