Fedora 30: FEDORA-2020-01ed02451f Critical: e2fsprogs Buffer Overflow

The e2fsprogs package contains a number of utilities for creating,

checking, modifying, and correcting any inconsistencies in second,

third and fourth extended (ext2/ext3/ext4) file systems. E2fsprogs

contains e2fsck (used to repair file system inconsistencies after an

unclean shutdown), mke2fs (used to initialize a partition to contain

an empty ext2 file system), debugfs (used to examine the internal

structure of a file system, to manually repair a corrupted

file system, or to create test cases for e2fsck), tune2fs (used to

modify file system parameters), and most of the other core ext2fs

file system utilities.

You should install the e2fsprogs package if you need to manage the

performance of an ext2, ext3, or ext4 file system.

Fix a potential out of bounds write when checking a maliciously corrupted file

system. This is probably not exploitable on 64-bit platforms, but may be

exploitable on 32-bit binaries depending on how the compiler lays out the stack

variables. (Addresses CVE-2019-5188) A maliciously corrupted file systems can

trigger buffer overruns in the quota code used by e2fsck. (Addresses

CVE-2019-5094) Fix potential use after free in calculate_tree()

* Thu Jan 16 2020 Lukas Czerner 1.44.6-2

- Prevent buffer overrun bugs in quota code (#1792192)

- Fix code execution vulnerability in directory rehashing (#1792193)

- Fix use-after-free in calculate_tree

[ 1 ] Bug #1792192 - CVE-2019-5094 e2fsprogs: crafted ext4 partition leads to out-of-bounds write [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1792192

[ 2 ] Bug #1792193 - CVE-2019-5188 e2fsprogs: Out-of-bounds write in e2fsck/rehash.c [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1792193

su -c 'dnf upgrade --advisory FEDORA-2020-01ed02451f' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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