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CVE-2011-2503

Status Candidate

Overview

The insert_module function in runtime/staprun/staprun_funcs.c in the systemtap runtime tool (staprun) in SystemTap before 1.6 does not properly validate a module when loading it, which allows local users to gain privileges via a race condition between the signature validation and the module initialization.

Related Files

Debian Security Advisory 2348-1
Posted Nov 21, 2011
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2348-1 - Several vulnerabilities were discovered in SystemTap, an instrumentation system for Linux.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2010-4170, CVE-2010-4171, CVE-2011-2503
SHA-256 | 11d65241a42e9924fa1a4281af619cedbc575a94bda21b4bad0f19ecaf7eddc5
Red Hat Security Advisory 2011-1089-01
Posted Jul 26, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1089-01 - SystemTap is an instrumentation system for systems running the Linux kernel. The system allows developers to write scripts to collect data on the operation of the system. A race condition flaw was found in the way the staprun utility performed module loading. A local user who is a member of the stapusr group could use this flaw to modify a signed module while it is being loaded, allowing them to escalate their privileges. SystemTap users should upgrade to these updated packages, which contain a backported patch to correct this issue.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2011-2503
SHA-256 | a497c7f2178a289d7629e75265fe19f811a1c19e782b0afc72abf662b775d3d8
Red Hat Security Advisory 2011-1088-01
Posted Jul 26, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1088-01 - SystemTap is an instrumentation system for systems running the Linux kernel. The system allows developers to write scripts to collect data on the operation of the system. It was found that SystemTap did not perform proper module path sanity checking if a user specified a custom path to the uprobes module, used when performing user-space probing . A local user who is a member of the stapusr group could use this flaw to bypass intended module-loading restrictions, allowing them to escalate their privileges by loading an arbitrary, unsigned module.

tags | advisory, arbitrary, kernel, local
systems | linux, redhat
advisories | CVE-2011-2502, CVE-2011-2503
SHA-256 | 52adcc4a9aefd37945fc629fa15624c8c51c02f09250bb3313127c02d6605f9c
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