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McAfee VirusScan: Insecure DT_RPATH

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200612-15 / vlnx
Release Date December 14, 2006
Latest Revision December 14, 2006: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-antivirus/vlnx <= 4510e All supported architectures

Related bugreports: #156989

Synopsis

McAfee VirusScan for Linux is distributed with an insecure DT_RPATH, potentially allowing a remote attacker to execute arbitrary code.

2.  Impact Information

Background

McAfee VirusScan for Linux is a commercial antivirus solution for Linux.

Description

Jakub Moc of Gentoo Linux discovered that McAfee VirusScan was distributed with an insecure DT_RPATH which included the current working directory, rather than $ORIGIN which was probably intended.

Impact

An attacker could entice a VirusScan user to scan an arbitrary file and execute arbitrary code with the privileges of the VirusScan user by tricking the dynamic loader into loading an untrusted ELF DSO. An automated system, such as a mail scanner, may be subverted to execute arbitrary code with the privileges of the process invoking VirusScan.

3.  Resolution Information

Workaround

Do not scan files or execute VirusScan from an untrusted working directory.

Resolution

As VirusScan verifies that it has not been modified before executing, it is not possible to correct the DT_RPATH. Furthermore, this would violate the license that VirusScan is distributed under. For this reason, the package has been masked in Portage pending the resolution of this issue.

Code Listing 3.1: Resolution

# emerge --ask --verbose --unmerge "app-antivirus/vlnx"

4.  References



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Page updated December 14, 2006

Summary: This is a Gentoo Linux Security Advisory

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