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Bug#: 245650
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Status: ASSIGNED
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Assigned To: Gentoo Security <security@gentoo.org>
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Reporter: Stefan Behte <craig@gentoo.org>
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Bug 245650 depends on: Show dependency tree
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Description:   Opened: 2008-11-05 12:19 0000 
1) A vulnerability is caused due to the "hfsplus_find_cat()" function
in fs/hfsplus/catalog.c not properly checking the catalog name length.
This can be exploited to crash a system by e.g. mounting a specially
crafted hfsplus file system.

2) A vulnerability is caused due to the "hfsplus_block_allocate()"
function in fs/hfsplus/bitmap.c not properly checking the return
values of "read_mapping_page()" function before using them. This can
be exploited to crash a system by e.g. mounting a specially crafted
hfsplus file system.

Info copied from secunia advisory SA32510.

------- Comment #1 From Gordon Malm 2008-11-05 18:02:59 0000 ------- 
Patches are in stable-review for 2.6.27.  Not yet been added to 2.6.25/2.6.26
stable-queue.

http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=review-2.6.27/hfsplus-fix-buffer-overflow-with-a-corrupted-image.patch;h=c1ed9581904ff6f4c6716e2f5c1bbf00a6575e1f;hb=5ec3cec5e9b2b11eeb1294668bd865fabe8437a8

http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=review-2.6.27/hfsplus-check-read_mapping_page-return-value.patch;h=89be1a179372f3f861feab810102aa6bb3a24b52;hb=5ec3cec5e9b2b11eeb1294668bd865fabe8437a8

------- Comment #2 From Gordon Malm 2008-11-12 07:11:19 0000 ------- 
These vulns are fixed in 2.6.27.5.  Beware however, neither of these were fixed
in 2.6.25.20, nor 2.6.26.8.

------- Comment #3 From Kerin Millar 2009-07-21 00:32:06 0000 ------- 
hardened-kernel unaffected at present time. Removing alias.

PS: genpatches-2.6.27-5 added 2.6.27.5. Also, the relevant patches were added
to genpatches-2.6.26-4. =genpatches-2.6.25* remains vulnerable. However,
hardened-sources-2.6.25-r13 does not because we independently folded in the
necessary patches.
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