Debian Security Advisory DSA 3434-1 (linux - security update)

Published: 2016-01-04 23:00:00
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
linux on Debian Linux

For the oldstable distribution (wheezy), these problems have been fixed in version 3.2.73-2+deb7u2. The oldstable distribution (wheezy) is not affected by CVE-2015-8709 . For the stable distribution (jessie), these problems have been fixed in version 3.16.7-ckt20-1+deb8u2. CVE-2015-8543 was already fixed in version 3.16.7-ckt20-1+deb8u1. For the unstable distribution (sid), these problems have been fixed in version 4.3.3-3 or earlier. We recommend that you upgrade your linux Linux Distribution Packages.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leak. CVE-2015-7513 It was discovered that a local user permitted to use the x86 KVM subsystem could configure the PIT emulation to cause a denial of service (crash). CVE-2015-7550 Dmitry Vyukov discovered a race condition in the keyring subsystem that allows a local user to cause a denial of service (crash). CVE-2015-8543 It was discovered that a local user permitted to create raw sockets could cause a denial-of-service by specifying an invalid protocol number for the socket. The attacker must have the CAP_NET_RAW capability. CVE-2015-8550 Felix Wilhelm of ERNW discovered that the Xen PV backend drivers may read critical data from shared memory multiple times. This flaw can be used by a guest kernel to cause a denial of service (crash) on the host, or possibly for privilege escalation. CVE-2015-8551 / CVE-2015-8552 Konrad Rzeszutek Wilk of Oracle discovered that the Xen PCI backend driver does not adequately validate the device state when a guest configures MSIs. This flaw can be used by a guest kernel to cause a denial of service (crash or disk space exhaustion) on the host. CVE-2015-8569 Dmitry Vyukov discovered a flaw in the PPTP sockets implementation that leads to an information leak to local users. CVE-2015-8575 David Miller discovered a flaw in the Bluetooth SCO sockets implementation that leads to an information leak to local users. CVE-2015-8709 Jann Horn discovered a flaw in the permission checks for use of the ptrace feature. A local user who has the CAP_SYS_PTRACE capability within their own user namespace could use this flaw for privilege escalation if a more privileged process ever enters that user namespace. This affects at least the LXC system. In addition, this update fixes some regressions in the previous update: #808293 A regression in the UDP implementation prevented freeradius and some other applications from receiving data. #808602 / #808953 A regression in the USB XHCI driver prevented use of some devices in USB 3 SuperSpeed ports. #808973 A fix to the radeon driver interacted with an existing bug to cause a crash at boot when using some AMD/ATI graphics cards. This issue only affects wheezy.

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)


CVSS Score
Debian Local Security Checks

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