#VU15374 Buffer over-read in ClamAV - CVE-2018-15378

Vulnerability identifier: #VU15374

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-15378

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ClamAV
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: ClamAV

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 - 0.97.6, 0.98.0 - 0.98.7, 0.99.0 - 0.99.4, 0.100.0 - 0.100.1

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

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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.