linux kernel 2.6.33.7 integer overflow in ext4_ext_get_blocks()

2010.08.24
Credit: Eugene Teo
Risk: Low
Local: Yes
Remote: No
CWE: CWE-189


Ogólna skala CVSS: 4.7/10
Znaczenie: 6.9/10
Łatwość wykorzystania: 3.4/10
Wymagany dostęp: Lokalny
Złożoność ataku: Średnia
Autoryzacja: Nie wymagana
Wpływ na poufność: Brak
Wpływ na integralność: Brak
Wpływ na dostępność: Pełny

This was reported by a customer. Integer overflow flaws were found in ext4_ext_in_cache() and ext4_ext_get_blocks(). We managed to triggered the case in ext4_ext_get_blocks() but did not attempt to try the other. This can trigger a BUG() on certain configuration of ext4 file systems. Upstream commit: http://git.kernel.org/linus/731eb1a03a8445cde2cb23ecfb3580c6fa7bb690 https://bugzilla.redhat.com/show_bug.cgi?id=624327 Thanks, Eugene

Referencje:

http://marc.info/?l=oss-security&m=128197862004376&w=2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=731eb1a03a8445cde2cb23ecfb3580c6fa7bb690
https://bugzilla.redhat.com/show_bug.cgi?id=624327
http://xforce.iss.net/xforce/xfdb/61156
http://www.securityfocus.com/bid/42477
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34
http://marc.info/?l=oss-security&m=128201627016896&w=2
http://marc.info/?l=oss-security&m=128192548904503&w=2


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