Bug 125647 – games-action/bzflag - server can be crashed remotely

• Product: Gentoo Security
• Status: RESOLVED FIXED

[Description Carsten Lohrke (RETIRED) 2006-03-09 14:25:21 UTC]

The callsigns used by the clients are not checked or re-delimited by
the server so is possible for a client to pass a callsign with no NULL
bytes at its end causing problems (crash) to the server during the
handling of this string.
On both Linux and Windows for x86 (using the precompiled packages) I
have reached the server crash without problems but is possible that in
some configurations the crash could happen after many tries or also
never, depending by how the memory is handled on that platform.

The bug can be exploited also versus password protected servers without
knowing the right keyword.

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

[Comment 1 Thierry Carrez (RETIRED) 2006-03-11 03:25:07 UTC]

One more on games team plate.
Too bad Luigi decided to do more auditing on games servers while our games team is silent :)

[Comment 2 Mr. Bones. (RETIRED) 2006-03-11 20:35:27 UTC]

it's masked.

[Comment 3 David Grant 2006-03-12 20:08:07 UTC]

Can bzflag be split into server and client ebuilds? It sounds like this doesn't affect the client.

[Comment 4 Thierry Carrez (RETIRED) 2006-03-13 10:30:28 UTC]

No masking GLSA as this is not a critical security issue.
Setting this to enhancement to remember to remove bzflag at some point in the future.

Asking to separate between server and client should be done a separate non-security bug, assigend to teh games team.

[Comment 5 Tupone Alfredo 2006-03-13 10:38:34 UTC]

remove? For about a 4 lines patch to apply ? :( 
I love bzflag

[Comment 6 Benno Schulenberg 2006-03-14 11:26:20 UTC]

At comment #5: which 4-line patch, Tupone?  Please attach?

[Comment 7 Tupone Alfredo 2006-03-14 11:38:45 UTC]

Created attachment 82128 [details, diff]
bzflag-callsignfix.patch

Patch to fix callsign, and others, ... overflow

[Comment 8 Chris Gianelloni (RETIRED) 2006-03-14 13:47:12 UTC]

Tupone: feel free to fix the package and unmask it instead, as an actual fix is *always* the preferred solution.

[Comment 9 Tupone Alfredo 2006-03-19 13:36:39 UTC]

Fixed in CVS.
Please stabilize bzflag-2.0.4.20050930

[Comment 10 Tupone Alfredo 2006-03-19 13:37:30 UTC]

I meant to stabilize bzflag-2.0.4.20050930-r1
Sorry

[Comment 11 Tupone Alfredo 2006-03-20 12:12:51 UTC]

security flaw fixed.
package unmasked

[Comment 12 Chris Gianelloni (RETIRED) 2006-03-22 06:42:54 UTC]

I've marked this stable on x86.

[Comment 13 Luis Medinas (RETIRED) 2006-03-22 17:19:24 UTC]

stable on amd64.

[Comment 14 Tupone Alfredo 2006-03-22 22:51:50 UTC]

It was marked stable on ppc
I think bug could be closed

[Comment 15 Sune Kloppenborg Jeppesen (RETIRED) 2006-03-22 23:25:41 UTC]

This one is ready for GLSA decision. I tend to vote NO.

[Comment 16 Thierry Carrez (RETIRED) 2006-03-26 09:26:46 UTC]

I tend to vote NO too for DoS on game server. Closing, feel free to reopen if you disagree.