CVE-2009-4034 Security feature bypass in n/a
Attackers can bypass SSL hostname verification in PostgreSQL by exploiting null byte handling in X.509 certificates, enabling man-in-the-middle attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-4034?
CVE-2009-4034 is a medium-severity vulnerability in Postgresql Postgresql, published on 15 Dec 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-310
Which versions are affected by CVE-2009-4034?
It affects 1 product.
Products include Postgresql Postgresql.
How do I fix CVE-2009-4034?
Upgrade to a fixed version.
Is CVE-2009-4034 being exploited?
There is no known exploitation of CVE-2009-4034 in the wild and no public exploit code.
Other vulnerabilities in Postgresql Postgresql
Sources
Also known as GHSA-6wgc-gv8j-fmpq.