Heap-based buffer over-read in clamav (Alpine package)

1) Heap-based buffer over-read

EUVDB-ID: #VU10315

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12377

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to input validation checking mechanisms in mew packet files. A remote attacker can send a specially crafted .pdf file, trigger a heap-based buffer over-read condition in mew.c and cause the service to crash or execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

clamav (Alpine package): 0.97.3-r0 - 0.97.8-r0

External links

http://git.alpinelinux.org/aports/commit/?id=3b5a0401336d78fb0ee7f8579876034537911de4

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.