ClamAV: Remote execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200601-07 / clamav
Release Date	January 13, 2006
Latest Revision	January 13, 2006: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-antivirus/clamav	< 0.88	>= 0.88	All supported architectures

Related bugreports: #118459

Synopsis

ClamAV is vulnerable to a buffer overflow which may lead to remote execution of arbitrary code.

2. Impact Information

Background

ClamAV is a GPL virus scanner.

Description

Zero Day Initiative (ZDI) reported a heap buffer overflow vulnerability. The vulnerability is due to an incorrect boundary check of the user-supplied data prior to copying it to an insufficiently sized memory buffer. The flaw occurs when the application attempts to handle compressed UPX files.

Impact

For example by sending a maliciously crafted UPX file into a mail server that is integrated with ClamAV, a remote attacker's supplied code could be executed with escalated privileges.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All ClamAV users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.88"

4. References

CVE-2006-0162

Page updated January 13, 2006

Summary: This is a Gentoo Linux Security Advisory

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