Bug 125304 – <=games-strategy/freeciv-2.0.7 - remotely triggered oom condition

• Product: Gentoo Security
• Status: RESOLVED FIXED

[Description Carsten Lohrke (RETIRED) 2006-03-06 15:20:17 UTC]

Freeciv supports both plain and compressed data (admins can disable
this feature only recompiling the server from the source code with
USE_COMPRESSION undefined).
When the server receives a jumbo data (size set to 0xffff) it reads
the subsequent 32 bits number which identifies the size of the
compressed data.
Then it makes a signed comparison to know if the compressed size is
major than the data received, if the client uses a negative compressed
size value it will be able to elude this check.
After having substracted 6 bytes (header size) from this number the
server tries to allocate the memory needed for decompressing the data
which is fixed to 100 times this size.
If the memory cannot be allocated the server terminates or freezes
showing an out of memory message.

http://aluigi.altervista.org/adv/freecivdos-adv.txt

[Comment 1 Stefan Cornelius (RETIRED) 2006-03-06 15:26:00 UTC]

arches please test and mark stable, thank you.

[Comment 2 Jason Wever (RETIRED) 2006-03-06 19:56:47 UTC]

I'm assuming you mean 2.0.8 here, but please use exact versions in the future to avoid any confusion.

[Comment 3 Mr. Bones. (RETIRED) 2006-03-06 21:41:00 UTC]

x86 is stable.

[Comment 4 Gustavo Zacarias (RETIRED) 2006-03-07 09:06:18 UTC]

sparcenstein!

[Comment 5 Thierry Carrez (RETIRED) 2006-03-07 13:31:28 UTC]

Removing x86 which is already marked stable

[Comment 6 Joe Jezak (RETIRED) 2006-03-07 19:04:46 UTC]

Marked ppc stable by Pylon, tested by mabi.

[Comment 7 Stefan Cornelius (RETIRED) 2006-03-08 00:37:45 UTC]

removing ppc from CC because of comment #6

[Comment 8 Jose Luis Rivero (yoswink) (RETIRED) 2006-03-09 03:42:56 UTC]

alpha is always ready for fun! 

eer ... alpha stable.

[Comment 9 Simon Stelling (RETIRED) 2006-03-12 07:53:30 UTC]

amd64 stable, sorry for the delay

[Comment 10 Stefan Cornelius (RETIRED) 2006-03-12 07:57:33 UTC]

No RCE, no critical service - tend to say no here

[Comment 11 Mr. Bones. (RETIRED) 2006-03-12 09:13:44 UTC]

2.0.7 has been removed from portage.

[Comment 12 Thierry Carrez (RETIRED) 2006-03-12 10:49:18 UTC]

Bad players can kill the game server, I tend to vote yes, so we'll need one more opinion :) We usually don't issue GLSAs for game servers DoS though.

[Comment 13 Stefan Cornelius (RETIRED) 2006-03-12 12:15:23 UTC]

Ah well, you know what: i happened to have some spare time to draft and you are the leader, so i'll follow you - let's have a glsa.

[Comment 14 Stefan Cornelius (RETIRED) 2006-03-16 02:15:10 UTC]

GLSA 200603-11

Thanks everybody.