Secunia Security Advisory - Amit Klein has reported a vulnerability in OpenBSD, which can be exploited by malicious people to poison the DNS cache.
96d2d730570dd17751a832ad1a34096931cd11fcf904779c8b5d9886cad1e0c7
----------------------------------------------------------------------
A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI
has been released. The new version includes many new and advanced
features, which makes it even easier to stay patched.
Download and test it today:
https://psi.secunia.com/
Read more about this new version:
https://psi.secunia.com/?page=changelog
----------------------------------------------------------------------
TITLE:
OpenBSD DNS Server PRNG Transaction ID Vulnerability
SECUNIA ADVISORY ID:
SA28819
VERIFY ADVISORY:
http://secunia.com/advisories/28819/
CRITICAL:
Moderately critical
IMPACT:
Spoofing
WHERE:
>From remote
OPERATING SYSTEM:
OpenBSD 3.x
http://secunia.com/product/100/
OpenBSD 4.0
http://secunia.com/product/12486/
OpenBSD 4.1
http://secunia.com/product/16044/
OpenBSD 4.2
http://secunia.com/product/16045/
DESCRIPTION:
Amit Klein has reported a vulnerability in OpenBSD, which can be
exploited by malicious people to poison the DNS cache.
The vulnerability is caused due to a weakness within the OpenBSD DNS
server's pseudo random number generator (PRNG). This can be exploited
to obtain the DNS transaction ID and poison the DNS cache.
The vulnerability is reported in OpenBSD versions 3.3 to 4.2.
SOLUTION:
Do not rely on the information returned by an OpenBSD DNS server.
PROVIDED AND/OR DISCOVERED BY:
Amit Klein, Trusteer
ORIGINAL ADVISORY:
http://www.trusteer.com/docs/dnsopenbsd.html
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------