Vulnerability Note VU#362983

Linux kernel RDS protocol vulnerability

Original Release date: 25 Oct 2010 | Last revised: 25 Oct 2010

Overview

The RDS protocol implementation of Linux kernels 2.6.30 through 2.6.38-rc8 contain a local privilege escalation vulnerability.

Description

Kernel functions fail to properly check if a user supplied address exists in the user segment of memory. By providing a kernel address to a socket call an unprivileged user can execute arbitrary code as root. Additional details can be found in the VSR Security Advisory.

Impact

An unprivileged local attacker can escalate their privileges to root.

Solution

Apply an update for the specific Linux distribution used.

If the RDS protocol is not needed, it can be disabled with the following command run as root.

echo "alias net-pf-21 off" > /etc/modprobe.d/disable-rds 

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Debian GNU/LinuxAffected-25 Oct 2010
Gentoo LinuxAffected-25 Oct 2010
Red Hat, Inc.Affected-25 Oct 2010
Slackware Linux Inc.Affected-25 Oct 2010
UbuntuAffected-25 Oct 2010
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A

References

Credit

Thanks to Dan Rosenberg of Virtual Security Research for researching and publishing the details of this vulnerability.

This document was written by Jared Allar.

Other Information

  • CVE IDs: CVE-2010-3904
  • Date Public: 19 Oct 2010
  • Date First Published: 25 Oct 2010
  • Date Last Updated: 25 Oct 2010
  • Severity Metric: 20.84
  • Document Revision: 12

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