Overview
Recently, a code execution vulnerability (CVE-2019-18408) was disclosed in the security update of Debian, Ubuntu, Gentoo and other distributions.
Libarchive is an open source compression library that is widely used for accessing a large number of compressed file formats. It is included by default in Debian, Ubuntu, Gentoo, Arch Linux, FreeBSD and NetBSD distributions. Some commonly used command line tools such as tar, cpio, zcat, etc. also use libarchive.
archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation. Attackers use well-constructed compressed files that may be executed when affected users read these malicious compressed files using Libarchive or Libarchive-containing software.
Several released versions of Linux and FreeBSD fixed this vulnerability last week. Although Libarchive is also included in Mac OS X and Windows 10, the vulnerability does not affect both operating systems
References
Affected Products and Versions
- Libarchive Version < 3.4.0
Unaffected Products and Versions
- Libarchive Version == 3.4.0（up to date）
Solution
The latest version of the vulnerability has been fixed by the Libarchive team and it is recommended that affected users download and update as soon as possible at the following link.
https://github.com/libarchive/libarchive/releases/tag/v3.4.0
See the release security update information for details:
- Debian：https://security-tracker.debian.org/tracker/CVE-2019-18408
- Ubuntu：https://usn.ubuntu.com/4169-1/
- Gentoo：https://bugs.gentoo.org/show_bug.cgi?id=CVE-2019-18408
- Arch Linux：https://www.archlinux.org/packages/?sort=&q=libarchive&maintainer=&flagged=
Statement
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