Debian LTS Advisory ([SECURITY] [DLA 833-1] linux security update)

Published: 2018-01-07 23:00:00
CVE Author: NIST National Vulnerability Database

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

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
linux on Debian Linux

Recommendations:
For Debian 7 'Wheezy', these problems have been fixed in version 3.2.84-2. For Debian 8 'Jessie', these problems have been fixed in version 3.16.39-1+deb8u1 or earlier. We recommend that you upgrade your linux Linux Distribution Packages.

Summary:
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or have other impacts. CVE-2014-9888 Russell King found that on ARM systems, memory allocated for DMA buffers was mapped with executable permission. This made it easier to exploit other vulnerabilities in the kernel. CVE-2014-9895 Dan Carpenter found that the MEDIA_IOC_ENUM_LINKS ioctl on media devices resulted in an information leak. CVE-2016-6786 / CVE-2016-6787 It was discovered that the performance events subsystem does not properly manage locks during certain migrations, allowing a local attacker to escalate privileges. This can be mitigated by disabling unprivileged use of performance events: sysctl kernel.perf_event_paranoid=3 CVE-2016-8405 Peter Pi of Trend Micro discovered that the frame buffer video subsystem does not properly check bounds while copying color maps to userspace, causing a heap buffer out-of-bounds read, leading to information disclosure. CVE-2017-5549 It was discovered that the KLSI KL5KUSB105 serial USB device driver could log the contents of uninitialised kernel memory, resulting in an information leak. CVE-2017-6001 Di Shen discovered a race condition between concurrent calls to the performance events subsystem, allowing a local attacker to escalate privileges. This flaw exists because of an incomplete fix of CVE-2016-6786. This can be mitigated by disabling unprivileged use of performance events: sysctl kernel.perf_event_paranoid=3 CVE-2017-6074 Andrey Konovalov discovered a use-after-free vulnerability in the DCCP networking code, which could result in denial of service or local privilege escalation. On systems that do not already have the dccp module loaded, this can be mitigated by disabling it: echo >> /etc/modprobe.d/disable-dccp.conf install dccp false For Debian 7 'Wheezy', these problems have been fixed in version 3.2.84-2.

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

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

https://nvd.nist.gov/vuln/detail/CVE-2014-9888
https://nvd.nist.gov/vuln/detail/CVE-2014-9895
https://nvd.nist.gov/vuln/detail/CVE-2016-6786
https://nvd.nist.gov/vuln/detail/CVE-2016-6787
https://nvd.nist.gov/vuln/detail/CVE-2016-8405
https://nvd.nist.gov/vuln/detail/CVE-2017-5549
https://nvd.nist.gov/vuln/detail/CVE-2017-6001
https://nvd.nist.gov/vuln/detail/CVE-2017-6074

References:

https://lists.debian.org/debian-lts-announce/2017/02/msg00021.html

Severity
High
CVSS Score
7.6
Published
2018-01-07
Modified
2019-03-18
Category
Debian Local Security Checks

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