ncpfs: Buffer overflow in ncplogin and ncpmap

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200412-09 / ncpfs
Release Date	December 15, 2004
Latest Revision	December 15, 2004: 01
Impact	high
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-fs/ncpfs	< 2.2.5	>= 2.2.5	All supported architectures

Related bugreports: #72820

Synopsis

ncpfs is vulnerable to a buffer overflow that could lead to local execution of arbitrary code with elevated privileges.

2. Impact Information

Background

ncpfs is a NCP protocol network filesystem that allows access to Netware services, for example to mount volumes of NetWare servers or print to NetWare print queues.

Description

Karol Wiesek discovered a buffer overflow in the handling of the '-T' option in the ncplogin and ncpmap utilities, which are both installed as SUID root by default.

Impact

A local attacker could trigger the buffer overflow by calling one of these utilities with a carefully crafted command line, potentially resulting in execution of arbitrary code with root privileges.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All ncpfs users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/ncpfs-2.2.5"

4. References

Updated December 15, 2004

Summary: This is a Gentoo Linux Security Advisory

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