Debian DSA-2370-1 : unbound - several vulnerabilities

high Nessus Plugin ID 57510

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Synopsis

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

Description

It was discovered that Unbound, a recursive DNS resolver, would crash when processing certain malformed DNS responses from authoritative DNS servers, leading to denial of service.

- CVE-2011-4528 Unbound attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone.

- CVE-2011-4869 Unbound does not properly process malformed responses which lack expected NSEC3 records.

Solution

Upgrade the unbound packages.

For the oldstable distribution (lenny), these problems have been fixed in version 1.4.6-1~lenny2.

For the stable distribution (squeeze), these problems have been fixed in version 1.4.6-1+squeeze2.

Plugin Details

Severity: High

ID: 57510

File Name: debian_DSA-2370.nasl

Version: 1.10

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 1/12/2012

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:unbound, cpe:/o:debian:debian_linux:5.0, cpe:/o:debian:debian_linux:6.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/22/2011

Reference Information

CVE: CVE-2011-4528, CVE-2011-4869

BID: 51115

DSA: 2370

Detections

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