Public Date:
743752: CVE-2011-3603 radvd: daemon would not fail on privsep_init() causing it to run with full root privileges

The MITRE CVE dictionary describes this issue as:

The router advertisement daemon (radvd) before 1.8.2 does not properly handle errors in the privsep_init function, which causes the radvd daemon to run as root and has an unspecified impact.

Find out more about CVE-2011-3603 from the MITRE CVE dictionary dictionary and NIST NVD.


A failure in privsep_init() does not cause radvd to run with full root privileges when invoked with the --username option specifying an unprivileged user. Rather it will run as a single process as the specified (unprivileged) radvd user, causing this issue to have no security impact (no unintended privilege elevation).

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4.4
Base Metrics AV:L/AC:M/Au:N/C:P/I:P/A:P
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 radvd Not affected
Red Hat Enterprise Linux 5 radvd Not affected
Red Hat Enterprise Linux 4 radvd Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.
Last Modified

CVE description copyright © 2017, The MITRE Corporation