Bug#609455: linux-2.6: block hardlinks to non-accessible sources

2011-01-09 Thread Maximilian Gaukler
Hello Ben, Ben Hutchings wrote: You seem to be a bit confused about this vulnerability. /bin/bash is of course not suid-root, only owned by root. You're right. To correct this: It is a big problem for suid-root binaries, but even a problem for non-suid-root-binaries like "/bin/bash" - if you

Bug#609455: linux-2.6: block hardlinks to non-accessible sources

2011-01-09 Thread Ben Hutchings
On Sun, 2011-01-09 at 17:51 +0100, Maximilian Gaukler wrote: > Package: linux-2.6 > Severity: wishlist > Tags: patch > > An indirect security problem in many linux systems is that a user can > generate hardlinks to files that he may not write. I suggest adding a > patch [1] to Debians kernel which

Bug#609455: linux-2.6: block hardlinks to non-accessible sources

2011-01-09 Thread Maximilian Gaukler
Package: linux-2.6 Severity: wishlist Tags: patch An indirect security problem in many linux systems is that a user can generate hardlinks to files that he may not write. I suggest adding a patch [1] to Debians kernel which adds a sysctl configuration option to forbid such hardlinks. This optio