ClamAV < 0.93.1 memcpy() .chm File Handling DoS (deprecated)

High Nessus Network Monitor Plugin ID 4642


The remote host is vulnerable to a Denial of Service (DoS) attack.


The remote host is running ClamAV client.

This version of ClamAV is vulnerable to a flaw within the 'libclamav/chmunpack.c' file. Specifically, when handling malformed '.chm' files, the application fails to adequately parse the file. An attacker sending a malformed .chm file to a server running ClamAV would be able to crash the service.


Upgrade to version 0.93.1 or higher.

See Also

Plugin Details

Severity: High

ID: 4642

File Name: 4642.prm

Family: Web Clients

Published: 2008/09/04

Modified: 2016/01/15

Dependencies: 1735, 8314

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


Base Score: 7.3

Temporal Score: 6.4


Temporal Vector: CVSS3#E:U/RL:O/RC:C

Reference Information

CVE: CVE-2008-3912, CVE-2008-3913, CVE-2008-1389, CVE-2008-3914

BID: 30994, 31051

OSVDB: 47881, 48237, 48238, 48239