xvfb-run 1.6.1 in Debian GNU/Linux, Ubuntu, Fedora 10, and possibly other operating systems place the magic cookie (MCOOKIE) on the command line, which allows local users to gain privileges by listing the process and its arguments.
CVSS Severity (version 2.0):
Impact Subscore: 6.4
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
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[oss-security] 20090505 CVE id request: Debian/Ubuntu specific issue in xvfb-run (xorg)
[oss-security] 20090505 Re: CVE id request: Debian/Ubuntu specific issue in xvfb-run (xorg)