Debian DSA-1961-1 : bind9 - DNS cache poisoning

Low Nessus Plugin ID 44826


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


Michael Sinatra discovered that the DNS resolver component in BIND does not properly check DNS records contained in additional sections of DNS responses, leading to a cache poisoning vulnerability. This vulnerability is only present in resolvers which have been configured with DNSSEC trust anchors, which is still rare.

Note that this update contains an internal ABI change, which means that all BIND-related packages (bind9, dnsutils and the library packages) must be updated at the same time (preferably using 'apt-get update' and 'apt-get upgrade'). In the unlikely event that you have compiled your own software against libdns, you must recompile this programs, too.


Upgrade the bind9 packages.

For the old stable distribution (etch), this problem has been fixed in version 9.3.4-2etch6.

For the stable distribution (lenny), this problem has been fixed in version 9.5.1.dfsg.P3-1+lenny1.

See Also

Plugin Details

Severity: Low

ID: 44826

File Name: debian_DSA-1961.nasl

Version: 1.16

Type: local

Agent: unix

Published: 2010/02/24

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: Low

CVSS v2.0

Base Score: 2.6

Temporal Score: 2.3

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:bind9, cpe:/o:debian:debian_linux:4.0, cpe:/o:debian:debian_linux:5.0

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: 2009/12/23

Reference Information

CVE: CVE-2009-4022

BID: 37118

CERT: 418861

DSA: 1961