Debian DSA-3696-1 : linux - security update (Dirty COW)

High Nessus Plugin ID 94146

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

- CVE-2015-8956 It was discovered that missing input sanitising in RFCOMM Bluetooth socket handling may result in denial of service or information leak.

- CVE-2016-5195 It was discovered that a race condition in the memory management code can be used for local privilege escalation.

- CVE-2016-7042 Ondrej Kozina discovered that incorrect buffer allocation in the proc_keys_show() function may result in local denial of service.

- CVE-2016-7425 Marco Grassi discovered a buffer overflow in the arcmsr SCSI driver which may result in local denial of service, or potentially, arbitrary code execution.

Additionally this update fixes a regression introduced in DSA-3616-1 causing iptables performance issues (cf. Debian Bug #831014).

Solution

Upgrade the linux packages.

For the stable distribution (jessie), these problems have been fixed in version 3.16.36-1+deb8u2.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831014

https://security-tracker.debian.org/tracker/CVE-2015-8956

https://security-tracker.debian.org/tracker/CVE-2016-5195

https://security-tracker.debian.org/tracker/CVE-2016-7042

https://security-tracker.debian.org/tracker/CVE-2016-7425

https://packages.debian.org/source/jessie/linux

https://www.debian.org/security/2016/dsa-3696

Plugin Details

Severity: High

ID: 94146

File Name: debian_DSA-3696.nasl

Version: 2.12

Type: local

Agent: unix

Published: 2016/10/20

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 6.3

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

Temporal Vector: CVSS2#E:H/RL:OF/RC:C

CVSS v3.0

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux, cpe:/o:debian:debian_linux:8.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/10/19

Exploitable With

CANVAS (CANVAS)

Core Impact

Reference Information

CVE: CVE-2015-8956, CVE-2016-5195, CVE-2016-7042, CVE-2016-7425

DSA: 3696

IAVA: 2016-A-0306