UFS Bug: FreeBSD 6.1/6.2/7.0: MOKB-08-11-2006, CVE-2006-5824,
ohartman at zedat.fu-berlin.de
Thu Nov 23 02:11:43 PST 2006
Tom Samplonius wrote:
> ----- O. Hartmann <ohartman at zedat.fu-berlin.de> wrote:
>> Is for these UFS bugs in FreeBSD since 6.1 a fix uderway?
>> MOKB-08-11-2006,CVE-2006-5824, MOKB-03-11-2006,CVE-2006-5679
> Probably not. In both cases a "crafted filesystem" is mounted to trigger crash. Garbage in, garbage out.
> It is hardly exploitable, since only root can mount filesystems. And only root could "craft" a bogus filesystem to crash the kernel. If you are root, "reboot" is a far faster way to crash the system.
> What the MOKB people seem to leave out, is: do their "crafted filesystems" pass a "fsck -f"? If fsck says the filesystem is good, then the kernel should not crash. But I suspect that "fsck -f" would fix the filesystem. (BTW, "-f" is mandatory as I suspect that these "crafted filesystems" would have the clean flag set). If "fsck -f" fixes the filesystem, then both of these bugs are bogus.
Thanks for this information. I recently saw this in MOKB and today, I
read about that again the the very wide spread news ticker from the
German IT magazine c't (look at
http://www.heise.de/newsticker/meldung/81454, but it is in German ).
From my point of view, this self-claimed 'neutral' magazine and its
news can hardly vanish their Linux affinity.
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