Debian DSA-3271-1 : nbd - security update

high Nessus Plugin ID 83788

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Synopsis

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

Description

Tuomas Rasanen discovered that unsafe signal handling in nbd-server, the server for the Network Block Device protocol, could allow remote attackers to cause a deadlock in the server process and thus a denial of service.

Tuomas Rasanen also discovered that the modern-style negotiation was carried out in the main server process before forking the actual client handler. This could allow a remote attacker to cause a denial of service (crash) by querying a non-existent export. This issue only affected the oldstable distribution (wheezy).

Solution

Upgrade the nbd packages.

For the oldstable distribution (wheezy), these problems have been fixed in version 1:3.2-4~deb7u5.

For the stable distribution (jessie), these problems have been fixed in version 1:3.8-4+deb8u1.

Plugin Details

Severity: High

ID: 83788

File Name: debian_DSA-3271.nasl

Version: 2.10

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 5/26/2015

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:nbd, cpe:/o:debian:debian_linux:7.0, cpe:/o:debian:debian_linux:8.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/23/2015

Reference Information

CVE: CVE-2013-7441, CVE-2015-0847

BID: 74557

DSA: 3271

Detections

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