Buffer over-read in libarchive (Alpine package)

Published: 2017-09-11

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-14166
CWE-ID	CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	libarchive (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Buffer over-read

EUVDB-ID: #VU15952

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14166

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in libarchive 3.3.2. A remote attacker can trigger xml_data heap-based buffer over-read and application crash via a specially crafted xar archive, related to the mishandling of empty strings in the atol8 function in archive_read_support_format_xar.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive (Alpine package): 3.2.2-r0 - 3.2.2-r1

External links

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.