Debian Security Advisory DSA 2469-1 (linux-2.6 - privilege escalation/denial of service)

Published: 2013-09-18 09:53:02
CVE Author: NIST National Vulnerability Database

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

Affected Versions:
linux-2.6 on Debian Linux

Recommendations:
For the stable distribution (squeeze), this problem has been fixed in version 2.6.32-44. Updates are currently only available for the amd64, i386 and sparc ports. Note: updated linux-2.6 Linux Distribution Packages will also be made available in the release of Debian 6.0.5, scheduled to take place the weekend of 2012.05.12. This pending update will be version 2.6.32-45, and provides an additional fix for build failures on some architectures. Users for whom this update is not critical, and who may wish to avoid multiple reboots, should consider waiting for the 6.0.5 release before updating, or installing the 2.6.32-45 version ahead of time from proposed-updates. The following matrix lists additional source Linux Distribution Packages that were rebuilt for compatibility with or to take advantage of this update:  Debian 6.0 (squeeze)user-mode-linux2.6.32-1um-4+44We recommend that you upgrade your linux-2.6 and user-mode-linux Linux Distribution Packages.

Summary:
Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2011-4086Eric Sandeen reported an issue in the journaling layer for ext4 filesystems (jbd2). Local users can cause buffers to be accessed after they have been torn down, resulting in a denial of service (DoS) due to a system crash. CVE-2012-0879Louis Rilling reported two reference counting issues in the CLONE_IO feature of the kernel. Local users can prevent io context structures from being freed, resulting in a denial of service. CVE-2012-1601Michael Ellerman reported an issue in the KVM subsystem. Local users could cause a denial of service (NULL pointer dereference) by creating VCPUs before a call to KVM_CREATE_IRQCHIP. CVE-2012-2123Steve Grubb reported an issue in fcaps, a filesystem-based capabilities system. Personality flags set using this mechanism, such as the disabling of address space randomization, may persist across suid calls. CVE-2012-2133Shachar Raindel discovered a use-after-free bug in the hugepages quota implementation. Local users with permission to use hugepages via the hugetlbfs implementation may be able to cause a denial of service (system crash).

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2012-2133
https://nvd.nist.gov/vuln/detail/CVE-2012-1601
https://nvd.nist.gov/vuln/detail/CVE-2012-0879
https://nvd.nist.gov/vuln/detail/CVE-2011-4086
https://nvd.nist.gov/vuln/detail/CVE-2012-2123

References:

http://www.debian.org/security/2012/dsa-2469.html

Severity
High
CVSS Score
7.2
Published
2013-09-18
Modified
2019-03-18
Category
Debian Local Security Checks

Free Vulnerability Scanning, Assessment and Management

Mageni's Platform is packed with all the features you need to scan, assess and manage vulnerabilities like this - it is free, open source, lightning fast, reliable and scalable.

Router
Servers
Laptop
Database
Group
Cloud

Frequently Asked Questions

No, you can scan concurrently as many assets as you want. Please note that you must be aware of the hardware requeriments of the platform to ensure a good performance.

No, you can add as many assest as you want. It doesn't matters if you have millions of assets, we won't charge you for that.

No. The software is completely free. We have no intention to charge you to use the software, in fact - it completely goes against our beliefs and business model.

A vulnerability is defined in the ISO 27002 standard as “A weakness of an asset or group of assets that can be exploited by one or more threats” (International Organization for Standardization, 2005)

We generate revenue by providing support and other services for customers that require a subscription so they get guaranteed support and enterprise services. To use Mageni's Platform is completely free, with no limits at all.

Yes. Mageni understands that there are professionals and businesses that need commercial support so Mageni provides an active support subscription with everything needed to run Mageni's Platform reliably and securely. More than software, it's access to security experts, knowledge resources, security updates, and support tools you can't get anywhere else. The subscription includes:

  • Ongoing delivery
    • Patches
    • Bug fixes
    • Updates
    • Upgrades
  • Technical support
    • 24/7 availability
    • Unlimited Incidents
    • Specialty-based routing
    • Multi-Channel
  • Commitments
    • Software certifications
    • Software assurance
    • SLA

No, we don't store the information of your vulnerabilities in our servers.

Vulnerability management is the process in which vulnerabilities in IT are identified and the risks of these vulnerabilities are evaluated. This evaluation leads to correcting the vulnerabilities and removing the risk or a formal risk acceptance by the management of an organization. The term vulnerability management is often confused with vulnerability scanning. Despite the fact both are related, there is an important difference between the two. Vulnerability scanning consists of using a computer program to identify vulnerabilities in networks, computer infrastructure or applications. Vulnerability management is the process surrounding vulnerability scanning, also taking into account other aspects such as risk acceptance, remediation etc. Source: "Implementing a Vulnerability Management Process". SANS Institute.

I am ready to start scanning for vulnerabilities