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Debian DSA-975-1 : nfs-user-server - buffer overflow

medium Nessus Plugin ID 22841

Synopsis

The remote Debian host is missing a security-related update.

Description

Marcus Meissner discovered that attackers can trigger a buffer overflow in the path handling code by creating or abusing existing symlinks, which may lead to the execution of arbitrary code.

This vulnerability isn't present in the kernel NFS server.

This update includes a bugfix for attribute handling of symlinks. This fix does not have security implications, but at the time when this DSA was prepared it was already queued for the next stable point release, so we decided to include it beforehand.

Solution

Upgrade the nfs-user-server package.

For the old stable distribution (woody) this problem has been fixed in version 2.2beta47-12woody1.

For the stable distribution (sarge) this problem has been fixed in version 2.2beta47-20sarge2.

See Also

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=350020

http://www.debian.org/security/2006/dsa-975

Plugin Details

Severity: Medium

ID: 22841

File Name: debian_DSA-975.nasl

Version: 1.17

Type: local

Agent: unix

Published: 10/14/2006

Updated: 1/4/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:nfs-user-server, cpe:/o:debian:debian_linux:3.0, cpe:/o:debian:debian_linux:3.1

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2/15/2006

Vulnerability Publication Date: 1/26/2006

Reference Information

CVE: CVE-2006-0043

DSA: 975