OSVDB ID: 24261 Title: tetris-bsd on Gentoo Linux checkscores() Function Local Overflow |
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Description |
A local overflow exists in tetris-bsd of the port bsd-games on Gentoo Linux. The checkscores() function in scores.c fails to validate a player's name, obtained from the '/var/games/tetris-bsd.scores' file, before it is printed into a buffer using sprintf, resulting in a stack overflow. The same function also reads player level without validation, resulting in an integer overflow. With a specially crafted request, an attacker can execute arbitrary code as a user with the permissions of the games group, resulting in a loss of integrity. |
Classification |
Location:
Local Access Required
Attack Type: Input Manipulation Impact: Loss of Integrity Disclosure: OSVDB Verified, Vendor Verified |
Solution |
Upgrade to version 2.17-r1 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround: do not add untrusted users to the "games" group. |
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Credit |
Unknown or Incomplete |