NAS: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200704-20 / NAS
Release Date	April 23, 2007
Latest Revision	April 23, 2007: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/nas	< 1.8b	>= 1.8b	All supported architectures

Related bugreports: #171428

Synopsis

The Network Audio System is vulnerable to a buffer overflow that could result in the execution of arbitrary code with root privileges.

2. Impact Information

Background

NAS is a network transparent, client/server audio transport system.

Description

Luigi Auriemma has discovered multiple vulnerabilities in NAS, some of which include a buffer overflow in the function accept_att_local(), an integer overflow in the function ProcAuWriteElement(), and a null pointer error in the function ReadRequestFromClient().

Impact

An attacker having access to the NAS daemon could send an overly long slave name to the server, leading to the execution of arbitrary code with root privileges. A remote attacker could also send a specially crafted packet containing an invalid client ID, which would crash the server and result in a Denial of Service.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All NAS users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/nas-1.8b"

4. References

Updated April 23, 2007

Summary: This is a Gentoo Linux Security Advisory

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