CVE-2014-3640 Null dereference in n/a

Low 2.1 Published 7 Nov 2014 Updated 6 Aug 2024

Local users can cause a denial of service in QEMU by sending a UDP packet with zero source port and address, triggering a NULL pointer dereference.

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-2014-3640?

CVE-2014-3640 is a low-severity vulnerability in Canonical Ubuntu Linux, published on 7 Nov 2014. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The sosendto function in slirp/udp.c in QEMU before 2.1.2 allows local users to cause a denial of service (NULL pointer dereference) by sending a udp packet with a value of 0 in the source port and address, which triggers access of an uninitialized socket.

Weakness: CWE-476

Which versions are affected by CVE-2014-3640?

It affects 7 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Qemu Qemu, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Hpc Node, Redhat Enterprise Linux Server and 1 more.

How do I fix CVE-2014-3640?

Upgrade to a fixed version.

Is CVE-2014-3640 being exploited?

There is no known exploitation of CVE-2014-3640 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2014-3640, GHSA-j3fm-c8x4-hh72, UBUNTU-CVE-2014-3640.