Debian DSA-3097-1 : unbound - security update

Medium Nessus Plugin ID 79884

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VPR Score: 3.6


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


Florian Maury from ANSSI discovered that unbound, a validating, recursive, and caching DNS resolver, was prone to a denial of service vulnerability. An attacker crafting a malicious zone and able to emit (or make emit) queries to the server can trick the resolver into following an endless series of delegations, leading to resource exhaustion and huge network usage.


Upgrade the unbound packages.

For the stable distribution (wheezy), this problem has been fixed in version 1.4.17-3+deb7u2.

For the upcoming stable distribution (jessie), this problem has been fixed in version 1.4.22-3.

See Also

Plugin Details

Severity: Medium

ID: 79884

File Name: debian_DSA-3097.nasl

Version: 1.11

Type: local

Agent: unix

Published: 2014/12/15

Updated: 2021/01/11

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

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

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/12/10

Reference Information

CVE: CVE-2014-8602

BID: 71589

DSA: 3097