NBD Tools: Buffer overflow in NBD server

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200512-14 / NBD
Release Date	December 23, 2005
Latest Revision	December 23, 2005: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
sys-block/nbd	< 2.8.2-r1	>= 2.8.2-r1	All supported architectures

Related bugreports: #116314

Synopsis

The NBD server is vulnerable to a buffer overflow that may result in the execution of arbitrary code.

2. Impact Information

Background

The NBD Tools are the Network Block Device utilities allowing one to use remote block devices over a TCP/IP network. It includes a userland NBD server.

Description

Kurt Fitzner discovered that the NBD server allocates a request buffer that fails to take into account the size of the reply header.

Impact

A remote attacker could send a malicious request that can result in the execution of arbitrary code with the rights of the NBD server.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All NBD Tools users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-block/nbd-2.8.2-r1"

4. References

CVE-2005-3534

Updated December 23, 2005

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.