Denial of service in ClamAV

1) Buffer over-read

EUVDB-ID: #VU15374

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-2018-15378

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 condition related to MEW unpacker within the unmew11() function in libclamav/mew.c. A remote attacker can create a specially crafted EXE file, pass it to vulnerable application and trigger invalid memory read.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ClamAV: 0.97.0 - 0.100.1

External links

http://bugzilla.clamav.net/show_bug.cgi?id=12170
http://secuniaresearch.flexerasoftware.com/advisories/83000/
http://usn.ubuntu.com/3789-1/

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.