CVE-2009-1893 Path traversal in n/a

Medium 6.9 Published 17 Jul 2009 Updated 7 Aug 2024

Local attackers can overwrite arbitrary files via symlink attacks in the Red Hat DHCP init script, requiring local access to exploit.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2009-1893?

CVE-2009-1893 is a medium-severity path traversal vulnerability in Redhat Enterprise Linux, published on 17 Jul 2009. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The configtest function in the Red Hat dhcpd init script for DHCP 3.0.1 in Red Hat Enterprise Linux (RHEL) 3 allows local users to overwrite arbitrary files via a symlink attack on an unspecified temporary file, related to the "dhcpd -t" command.

Weakness: CWE-59

Which versions are affected by CVE-2009-1893?

It affects 2 products.

Products include Isc Dhcp, Redhat Enterprise Linux.

How do I fix CVE-2009-1893?

Apply the vendor's patch.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2009-1893 being exploited?

There is no known exploitation of CVE-2009-1893 in the wild and no public exploit code.

All Redhat Enterprise Linux vulnerabilities

Sources

Also known as GHSA-45mc-hh26-869m.