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CentOS 5 : systemtap (CESA-2010:0894)

high Nessus Plugin ID 50809

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

Updated systemtap packages that fix two security issues are now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

SystemTap is an instrumentation system for systems running the Linux kernel, version 2.6. Developers can write scripts to collect data on the operation of the system. staprun, the SystemTap runtime tool, is used for managing SystemTap kernel modules (for example, loading them).

It was discovered that staprun did not properly sanitize the environment before executing the modprobe command to load an additional kernel module. A local, unprivileged user could use this flaw to escalate their privileges. (CVE-2010-4170)

It was discovered that staprun did not check if the module to be unloaded was previously loaded by SystemTap. A local, unprivileged user could use this flaw to unload an arbitrary kernel module that was not in use. (CVE-2010-4171)

Note: After installing this update, users already in the stapdev group must be added to the stapusr group in order to be able to run the staprun tool.

Red Hat would like to thank Tavis Ormandy for reporting these issues.

SystemTap users should upgrade to these updated packages, which contain backported patches to correct these issues.

Solution

Update the affected systemtap packages.

See Also

http://www.nessus.org/u?9ff0d842

http://www.nessus.org/u?b9c62e13

Plugin Details

Severity: High

ID: 50809

File Name: centos_RHSA-2010-0894.nasl

Version: 1.16

Type: local

Agent: unix

Published: 11/24/2010

Updated: 1/4/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:systemtap-runtime, p-cpe:/a:centos:centos:systemtap, p-cpe:/a:centos:centos:systemtap-initscript, p-cpe:/a:centos:centos:systemtap-testsuite, p-cpe:/a:centos:centos:systemtap-client, p-cpe:/a:centos:centos:systemtap-sdt-devel, cpe:/o:centos:centos:5, p-cpe:/a:centos:centos:systemtap-server

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/17/2010

Vulnerability Publication Date: 12/7/2010

Exploitable With

Metasploit (SystemTap MODPROBE_OPTIONS Privilege Escalation)

Reference Information

CVE: CVE-2010-4170, CVE-2010-4171

RHSA: 2010:0894