Gentoo alert: Linux kernel AMD64 ptrace vulnerability

Posted by dave on Feb 16, 2004 5:33 PM EDT
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A vulnerability has been discovered by in the ptrace emulation code for AMD64 platforms when eflags are processed, allowing a local user to obtain elevated priveleges.

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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200402-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ http://security.gentoo.org - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

~ Severity: Normal ~ Title: Linux kernel AMD64 ptrace vulnerability ~ Date: February 17, 2004 ~ ID: 200402-06

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Synopsis ========

A vulnerability has been discovered by in the ptrace emulation code for AMD64 platforms when eflags are processed, allowing a local user to obtain elevated priveleges.

Affected packages =================

~ ------------------------------------------------------- ~ Kernel / Unaffected Version ~ -------------------------------------------------------

~ ck-sources..........................2.6.2-r1........... ~ development-sources.................2.6.2.............. ~ gentoo-dev-sources..................2.6.2.............. ~ gentoo-sources......................2.4.20-r12......... ~ gs-sources..........................2.4.25_pre7-r1..... ~ vanilla-prepatch-sources............2.4.25_rc3......... ~ vanilla-sources.....................2.4.24-r1..........

Description ===========

A vulnerability has been discovered by Andi Kleen in the ptrace emulation code for AMD64 platforms when eflags are processed, allowing a local user to obtain elevated priveleges. The Common Vulnerabilities and Exposures project has assigned CAN-2004-0001 to this issue.

Impact ======

( Only users of the AMD64 platform are affected )

In this scenario, a user may be able to obtain elevated priveleges, including root access. However, no public exploit is known for the vulnerability at this time.

Workaround ==========

There is no temporary workaround - a kernel upgrade is required. A list of unaffected kernels is provided along with this announcement.

Resolution ==========

Users are encouraged to upgrade to the latest available sources for their system:

~ # emerge sync ~ # emerge -pv your-favorite-sources

~ # emerge your-favorite-sources

~ # # Follow usual procedures for compiling and installing a kernel. ~ # # If you use genkernel, run genkernel as you would do normally.

~ # # See http://www.gentoo.org/doc/en/handbook/handbook.xml for help.

Concerns? =========

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to [e-mail:security@gentoo.org] or alternatively, you may file a bug at http://bugs.gentoo.org.

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