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URBAN Symlink and Multiple Local Buffer Overflow Vulnerabilities
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Secunia Advisory:
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SA16680
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Release Date:
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2005-09-05
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Last Update:
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2005-09-27
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Popularity:
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4,251 views
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Critical:
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Not critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Partial Fix
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| Software: | URBAN The Cyborg Project 1.x
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| CVE reference: | CVE-2005-2864
CVE-2005-2810
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Description:
shaun has reported some vulnerabilities in URBAN, which can be exploited by malicious, local users to gain escalated privileges.
1) Some boundary errors in config.cc, game.cc, highscor.cc, and meny.cc when handling an overly long "HOME" environment variable can be exploited to cause stack-based buffer overflows and execute arbitrary code with "games" group privileges.
2) A malicious user can create a symbolic link to his save game file "~/.urban/savegame.dat" in order to create or overwrite arbitrary files on the system with "games" group privileges.
The vulnerabilities have been reported in version 1.5.3. Prior versions may also be affected.
NOTE: The official release of URBAN does reportedly not install URBAN with setgid "games" privileges by default. However, some Linux distributions install URBAN with setgid "games" privileges.
Solution:
The first vulnerability has been fixed in the CVS repositories.
http://www.freebsd.org/cgi/cvsweb.cgi/ports/games/urban/files/
Remove setgid "games" permissions.
Provided and/or discovered by:
shaun
Changelog:
2005-09-07: Updated status and "Description" section.
2005-09-27: Added CVE references.
Original Advisory:
http://www.vuxml.org/freebsd/08df5d46-1baf-11da-8038-0040f42d58c6.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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