PT-2008-6120 · Convirt · Convirt

Robert Buchholz · Published 2008-11-05 · Updated 2009-07-20 · CVE-2008-4946

Positive Technologies (AI Summary)

CVSS v2.0

6.9

Medium

Base vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions convirt version 0.8.2

Description The issue allows local users to overwrite arbitrary files via a symlink attack on the /tmp/set output temporary file. This is related to several provision.sh scripts in the image store/ directory, including template /provision.sh, Linux CD Install/provision.sh, Fedora PV Install/provision.sh, CentOS PV Install/provision.sh, common/provision.sh, example/provision.sh, and Windows CD Install/provision.sh.

Recommendations For convirt version 0.8.2, consider restricting access to the /tmp/set output temporary file to prevent symlink attacks until a patch is available. As a temporary workaround, avoid using the provision.sh scripts in the image store/ directory, specifically (1) template /provision.sh, (2) Linux CD Install/provision.sh, (3) Fedora PV Install/provision.sh, (4) CentOS PV Install/provision.sh, (5) common/provision.sh, (6) example/provision.sh, and (7) Windows CD Install/provision.sh, to minimize the risk of exploitation.

Exploit

Fix

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

CVE-2008-4946

Affected Products

Convirt

References · 5

• 🔥 http://dev.gentoo.org/~rbu/security/debiantemp/convirt · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2008-4946 · Security Note
• http://openwall.com/lists/oss-security/2008/10/30/2 · Note
• http://bugs.debian.org/496419 · Note
• https://bugs.gentoo.org/show_bug.cgi?id=235770 · Note