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| author | Sona Sarmadi <sona.sarmadi@enea.com> | 2015-03-12 11:01:01 +0100 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2015-03-16 17:38:49 +0000 |
| commit | 572437720b6698a3a10627fcd9654ef10f827836 (patch) | |
| tree | 44b2b4eddd418bc6cb1dc04194d19cbdc697049a /meta/recipes-devtools | |
| parent | 22c0bc1b80d87bfd4f8d1fcbbb231b994f7e03b8 (diff) | |
| download | openembedded-core-572437720b6698a3a10627fcd9654ef10f827836.tar.gz openembedded-core-572437720b6698a3a10627fcd9654ef10f827836.tar.bz2 openembedded-core-572437720b6698a3a10627fcd9654ef10f827836.zip | |
e2fsprogs: CVE-2015-0247
Fixes a heap buffer overflow in lib/ext2fs/openfs.c which allows
a trivial arbitrary memory write under certain conditions.
References
http://git.kernel.org/cgit/fs/ext2/e2fsprogs.git/commit/?id=f66e6ce4
http://www.ocert.org/advisories/ocert-2015-002.html
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Diffstat (limited to 'meta/recipes-devtools')
| -rw-r--r-- | meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2015-0247.patch | 58 | ||||
| -rw-r--r-- | meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb | 1 |
2 files changed, 59 insertions, 0 deletions
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2015-0247.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2015-0247.patch new file mode 100644 index 0000000000..4de67c9704 --- /dev/null +++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/CVE-2015-0247.patch @@ -0,0 +1,58 @@ +From f66e6ce4446738c2c7f43d41988a3eb73347e2f5 Mon Sep 17 00:00:00 2001 +From: Theodore Ts'o <tytso@mit.edu> +Date: Sat, 9 Aug 2014 12:24:54 -0400 +Subject: libext2fs: avoid buffer overflow if s_first_meta_bg is too big + +If s_first_meta_bg is greater than the of number block group +descriptor blocks, then reading or writing the block group descriptors +will end up overruning the memory buffer allocated for the +descriptors. Fix this by limiting first_meta_bg to no more than +fs->desc_blocks. This doesn't correct the bad s_first_meta_bg value, +but it avoids causing the e2fsprogs userspace programs from +potentially crashing. + +Fixes CVE-2015-0247 +Upstream-Status: Backport + +Signed-off-by: Theodore Ts'o <tytso@mit.edu> +Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com> + +diff --git a/lib/ext2fs/closefs.c b/lib/ext2fs/closefs.c +index 4599eef..1f99113 100644 +--- a/lib/ext2fs/closefs.c ++++ b/lib/ext2fs/closefs.c +@@ -344,9 +344,11 @@ errcode_t ext2fs_flush2(ext2_filsys fs, int flags) + * superblocks and group descriptors. + */ + group_ptr = (char *) group_shadow; +- if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ++ if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) { + old_desc_blocks = fs->super->s_first_meta_bg; +- else ++ if (old_desc_blocks > fs->super->s_first_meta_bg) ++ old_desc_blocks = fs->desc_blocks; ++ } else + old_desc_blocks = fs->desc_blocks; + + ext2fs_numeric_progress_init(fs, &progress, NULL, +diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c +index a1a3517..ba501e6 100644 +--- a/lib/ext2fs/openfs.c ++++ b/lib/ext2fs/openfs.c +@@ -378,9 +378,11 @@ errcode_t ext2fs_open2(const char *name, const char *io_options, + #ifdef WORDS_BIGENDIAN + groups_per_block = EXT2_DESC_PER_BLOCK(fs->super); + #endif +- if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ++ if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) { + first_meta_bg = fs->super->s_first_meta_bg; +- else ++ if (first_meta_bg > fs->desc_blocks) ++ first_meta_bg = fs->desc_blocks; ++ } else + first_meta_bg = fs->desc_blocks; + if (first_meta_bg) { + retval = io_channel_read_blk(fs->io, group_block + +-- +cgit v0.10.2 + diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb index 656793f9ab..87e06e3b58 100644 --- a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb +++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb @@ -20,6 +20,7 @@ SRC_URI += "file://acinclude.m4 \ file://0001-e2fsprogs-fix-cross-compilation-problem.patch \ file://misc-mke2fs.c-return-error-when-failed-to-populate-fs.patch \ file://cache_inode.patch \ + file://CVE-2015-0247.patch \ " SRC_URI[md5sum] = "3f8e41e63b432ba114b33f58674563f7" |