Ubuntu update for libarchive

Published: 2020-03-03

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-19221 CVE-2020-9308
CWE-ID	CWE-125 CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	libarchive (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU22931

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19221

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in "archive_wstring_append_from_mbs" in "archive_string.c" because of an incorrect "mbrtowc" or "mbtowc" call. A remote attacker can create a specially crafted archive file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected packages.

Ubuntu 19.10: libarchive13 - 3.4.0-1ubuntu0.1
Ubuntu 18.04 LTS: libarchive13 - 3.2.2-3.1ubuntu0.6
Ubuntu 16.04 LTS: libarchive13 - 3.1.2-11ubuntu0.16.04.8

Vulnerable software versions

libarchive (Ubuntu package): 3.1.2-11ubuntu0.16.04.1 - 3.2.2-3.1ubuntu0.5

External links

http://usn.ubuntu.com/4293-1/

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Buffer overflow

EUVDB-ID: #VU25750

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-9308

CWE-ID: CWE-119 - Memory corruption