Heap-based buffer overflow in libarchive (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU32266

Risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-4300

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Integer overflow in the read_SubStreamsInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.1. A remote attacker can use a 7zip file with a large number of substreams to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libarchive (Alpine package): 3.2.0-r0

CPE2.3

• cpe:2.3:a:alpine:libarchive_alpine_package:3.2.0-r0:*:*:*:*:alpine_linux:*:3.3

External links

https://git.alpinelinux.org/aports/commit/?id=99073b453f33a5d1dd05323701be2557e6cd4905
https://git.alpinelinux.org/aports/commit/?id=1245e3e71c664fc180d3a6f17a8aac878007bed2

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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