Out-of-bounds read in libarchive

1) Out-of-bounds read

EUVDB-ID: #VU33268

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5601

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

An error in the lha_read_file_header_1() function (archive_read_support_format_lha.c) in libarchive 3.2.2 allows remote attackers to trigger an out-of-bounds read memory access and subsequently cause a crash via a specially crafted archive.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive: 3.2.2

External links

http://www.securityfocus.com/bid/95837
http://www.securitytracker.com/id/1037974
http://github.com/libarchive/libarchive/commit/98dcbbf0bf4854bf987557e55e55fff7abbf3ea9
http://lists.debian.org/debian-lts-announce/2018/11/msg00037.html
http://secunia.com/secunia_research/2017-3/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.