E2fsprogs: Multiple buffer overflows

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200712-13 / e2fsprogs
Release Date	December 18, 2007
Latest Revision	December 18, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
sys-fs/e2fsprogs	< 1.40.3	>= 1.40.3	All supported architectures

Related bugreports: #201546

Synopsis

Multiple heap-based buffer overflows in E2fsprogs could result in the execution of arbitrary code.

2. Impact Information

Background

E2fsprogs provides utilities for use with the ext2 and ext3 file systems including the libext2fs library that allows user-level programs to manipulate an ext2 or ext3 file system.

Description

Rafal Wojtczuk (McAfee AVERT Research) discovered multiple integer overflows in libext2fs, that are triggered when processing information from within the file system, resulting in heap-based buffer overflows.

Impact

An attacker could entice a user to process a specially-crafted ext2 or ext3 file system image (with tools linking against libext2fs, e.g. fsck, forensic tools or Xen's pygrub), possibly resulting in the execution of arbitrary code with the privileges of the user running the application.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All E2fsprogs users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-fs/e2fsprogs-1.40.3"

4. References

CVE-2007-5497

Updated December 18, 2007

Summary: This is a Gentoo Linux Security Advisory

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