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Bug#: 199967
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Status: RESOLVED
Resolution: FIXED
Assigned To: Gentoo Security <security@gentoo.org>
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Reporter: Lars Hartmann <lars@chaotika.org>
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Description:   Opened: 2007-11-22 11:21 0000 
A vulnerability has been reported in nss-mdns, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to the use of miss-aligned data structures
within the "_nss_mdns_gethostbyname2_r()" function in nss.c and can be
exploited to crash an application using the library.

The vulnerability is reported in versions prior to 0.10 running on the ARM and
SPARC architectures.

Solution:
Update to version 0.10.

Provided and/or discovered by:
Daniel Smolik

Original Advisory:
Debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=423222
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=451428

nss-mdns:
http://0pointer.de/lennart/projects/nss-mdns/#news

Reproducible: Always

------- Comment #1 From Lars Hartmann 2007-11-22 11:23:08 0000 ------- 
please have a look at it

------- Comment #2 From Lars Hartmann 2007-11-22 11:24:28 0000 ------- 
corrected severity Level

------- Comment #3 From Saleem Abdulrasool 2007-11-22 20:32:14 0000 ------- 
nss-mdns-0.10 has been in the tree, please stable.

------- Comment #4 From Markus Meier 2007-11-23 15:29:59 0000 ------- 
x86 stable and added quotes

------- Comment #5 From Samuli Suominen 2007-11-23 22:13:01 0000 ------- 
amd64 stable

------- Comment #6 From Brent Baude 2007-11-24 04:37:39 0000 ------- 
ppc stable

------- Comment #7 From Robert Buchholz 2007-11-26 01:59:12 0000 ------- 
This does not affect x86 and amd64 systems because they do not require strict
alignment. While I am not sure about ppc, and only ARM and SPARC are mentioned
affected, plus the impact is DoS, I vote NO.

------- Comment #8 From Pierre-Yves Rofes 2007-11-26 08:14:40 0000 ------- 
no too, closing.
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