OpenTTD Client Disconnection Handling Use-after-free Vulnerability

2010.11.25

Credit: Vulnerability reported by the vendor

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2010-4168

CWE: CWE-399

CVSS Base Score: 5/10

Impact Subscore: 2.9/10

Exploitability Subscore: 10/10

Exploit range: Remote

Attack complexity: Low

Authentication: No required

Confidentiality impact: None

Integrity impact: None

Availability impact: Partial

Hi folks,

we, the OpenTTD developers, have identified a security vulnerability in
OpenTTD (an open source game with multiplayer). Would you be so kind as 
to allocate a CVE id for this issue?

The issue concerns a denial of service vulnerability in the form of 
reading and writing already freed memory. The first vulnerable version 
is 1.0.0, the upcoming 1.0.5 release will have the issue fixed.

Once a CVE id is allocated, the issue will be documented at
http://security.openttd.org/CVE-2010-xxxx

Thanks in advance,
Remko 'Rubidium' Bijker

References:

http://security.openttd.org/en/patch/28.patch

http://security.openttd.org/en/CVE-2010-4168

http://www.vupen.com/english/advisories/2010/2985

http://vcs.openttd.org/svn/changeset/21182

http://marc.info/?l=oss-security&m=128984298802678&w=2

http://marc.info/?l=oss-security&m=128975491407670&w=2

See this note in RAW Version

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OpenTTD Client Disconnection Handling Use-after-free Vulnerability

References:

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