Debian DSA-1963-1 : unbound - cryptographic implementation error

High Nessus Plugin ID 44828

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 4.2


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


It was discovered that Unbound, a DNS resolver, does not properly check cryptographic signatures on NSEC3 records. As a result, zones signed with the NSEC3 variant of DNSSEC lose their cryptographic protection. (An attacker would still have to carry out an ordinary cache poisoning attack to add bad data to the cache.)


Upgrade the unbound package.

The old stable distribution (etch) does not contain an unbound package.

For the stable distribution (lenny), this problem has been fixed in version 1.0.2-1+lenny1.

See Also

Plugin Details

Severity: High

ID: 44828

File Name: debian_DSA-1963.nasl

Version: 1.8

Type: local

Agent: unix

Published: 2010/02/24

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 4.2

CVSS v2.0

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:unbound, cpe:/o:debian:debian_linux:5.0

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

Patch Publication Date: 2009/12/23

Reference Information

CVE: CVE-2009-3602

DSA: 1963

CWE: 310