Bug 616874 (CVE-2010-2534)

Summary:	CVE-2010-2534 OpenTTD: DoS (server infinite loop with excessive CPU use) when new client is joining server game (FS#3909)
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	atorkhov, felix
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-07-27 05:30:00 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	616875
Bug Blocks:

Description Jan Lieskovsky 2010-07-21 15:37:52 UTC

User with nickname 'Dolly' reported:
  [1] http://bugs.openttd.org/task/3909

a deficiency in the way OpenTTD transportation business simulation game
server synced local command queue to the command queue of the given socket
after receiving a command from a game joining client. A remote attacker
could use this flaw to conduct denial of service attacks, leading to game
server infinite loop consuming excessive amount of CPU time.

Proposed patch:
  [2] http://bugs.openttd.org/task/3909/getfile/6237/loop_fix.patch (needs
      upstream review and may change in final form)

CVE Request:
  [3] http://www.openwall.com/lists/oss-security/2010/07/20/1

How reproducible: Sometimes

Comment 1 Jan Lieskovsky 2010-07-21 15:39:53 UTC

This issue affects the versions of the openttd package, as shipped
with Fedora release of 12 and 13. Please fix once final version of
upstream patch is known.

Comment 2 Jan Lieskovsky 2010-07-21 15:42:16 UTC

Created openttd tracking bugs for this issue

Affects: fedora-all [bug 616875]

Comment 3 Jan Lieskovsky 2010-07-22 17:45:00 UTC

The CVE identifier of CVE-2010-2534 has been assigned to this issue
(http://www.openwall.com/lists/oss-security/2010/07/21/6).

Comment 4 Fedora Update System 2010-07-27 02:35:24 UTC

openttd-1.0.3-0.1.RC1.fc13 has been pushed to the Fedora 13 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2010-07-27 02:45:07 UTC

openttd-1.0.3-0.1.RC1.fc12 has been pushed to the Fedora 12 stable repository.  If problems still persist, please make note of it in this bug report.