GLSA 200512-14: NBD Tools: Buffer overflow in NBD server

http://security.gentoo.org/

Severity:	high
Title:	NBD Tools: Buffer overflow in NBD server
Date:	12/23/2005
Bugs:	#116314
ID:	200512-14

Synopsis

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

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.

Affected packages

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

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.

Workaround

There is no known workaround at this time.

Resolution

All NBD Tools users should upgrade to the latest version:

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

References

CVE-2005-3534

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200512-14.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.