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securityvulnsSecurityvulnsSECURITYVULNS:DOC:20145
HistoryJul 12, 2008 - 12:00 a.m.

[SECURITY] [DSA 1605-1] DNS vulnerability impact on the libc stub resolver

2008-07-1200:00:00
vulners.com
63
dns cache poisoning
remote attack
bind 9 resolver
ip address spoofing protection

EPSS

0.139

Percentile

95.8%

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Hash: SHA1


Debian Security Advisory DSA-1605-1 [email protected]
http://www.debian.org/security/ Florian Weimer
July 08, 2008 http://www.debian.org/security/faq


Package : glibc
Vulnerability : DNS cache poisoning
Problem type : remote
Debian-specific: no
CVE Id(s) : CVE-2008-1447
CERT advisory : VU#800113

Dan Kaminsky discovered that properties inherent to the DNS protocol
lead to practical DNS spoofing and cache poisoning attacks. Among
other things, successful attacks can lead to misdirected web traffic
and email rerouting.

At this time, it is not possible to implement the recommended
countermeasures in the GNU libc stub resolver. The following
workarounds are available:

  1. Install a local BIND 9 resoler on the host, possibly in
    forward-only mode. BIND 9 will then use source port randomization
    when sending queries over the network. (Other caching resolvers can
    be used instead.)

  2. Rely on IP address spoofing protection if available. Successful
    attacks must spoof the address of one of the resolvers, which may not
    be possible if the network is guarded properly against IP spoofing
    attacks (both from internal and external sources).

This DSA will be updated when patches for hardening the stub resolver
are available.


For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: [email protected]
Package info: `apt-cache show <pkg>' and http://packages.debian.org/&lt;pkg&gt;
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