Ubuntu 11.04 : linux vulnerabilities (USN-1285-1)

high Nessus Plugin ID 56978
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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Andrea Righi discovered a race condition in the KSM memory merging support. If KSM was being used, a local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2183)

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly handled unlock requests. A local attacker could exploit this to cause a denial of service. (CVE-2011-2491)

Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2494)

Vasiliy Kulikov discovered that /proc/PID/io did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. (CVE-2011-2495)

It was discovered that the wireless stack incorrectly verified SSID lengths. A local attacker could exploit this to cause a denial of service or gain root privileges. (CVE-2011-2517)

Christian Ohm discovered that the perf command looks for configuration files in the current directory. If a privileged user were tricked into running perf in a directory containing a malicious configuration file, an attacker could run arbitrary commands and possibly gain privileges.
(CVE-2011-2905)

Vasiliy Kulikov discovered that the Comedi driver did not correctly clear memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy. (CVE-2011-2909).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected packages.

See Also

https://usn.ubuntu.com/1285-1/

Plugin Details

Severity: High

ID: 56978

File Name: ubuntu_USN-1285-1.nasl

Version: 1.11

Type: local

Agent: unix

Published: 11/30/2011

Updated: 9/19/2019

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

Temporal Vector: E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-2.6-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-2.6-generic-pae, p-cpe:/a:canonical:ubuntu_linux:linux-image-2.6-server, p-cpe:/a:canonical:ubuntu_linux:linux-image-2.6-versatile, p-cpe:/a:canonical:ubuntu_linux:linux-image-2.6-virtual, cpe:/o:canonical:ubuntu_linux:11.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/29/2011

Vulnerability Publication Date: 5/24/2012

Reference Information

CVE: CVE-2011-2183, CVE-2011-2491, CVE-2011-2494, CVE-2011-2495, CVE-2011-2517, CVE-2011-2905, CVE-2011-2909

BID: 48101, 48538, 49140, 49141, 49408, 49411, 50314

USN: 1285-1