RHSA-2010:0125: Moderate: systemtap security update

First published: Mon Mar 01 2010(Updated: )

SystemTap is an instrumentation system for systems running the Linux<br>kernel, version 2.6. Developers can write scripts to collect data on the<br>operation of the system.<br>A buffer overflow flaw was found in SystemTap's tapset __get_argv()<br>function. If a privileged user ran a SystemTap script that called this<br>function, a local, unprivileged user could, while that script is still<br>running, trigger this flaw and cause memory corruption by running a command<br>with a large argument list, which may lead to a system crash or,<br>potentially, arbitrary code execution with root privileges. (CVE-2010-0411)<br>Note: SystemTap scripts that call __get_argv(), being a privileged<br>function, can only be executed by the root user or users in the stapdev<br>group. As well, if such a script was compiled and installed by root, users<br>in the stapusr group would also be able to execute it.<br>SystemTap users should upgrade to these updated packages, which contain a<br>backported patch to correct this issue.

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