ID

VAR-201604-0129

CVE

CVE-2016-3961

TITLE

Xen and Linux Kernel Service disruption in (DoS) Vulnerabilities

DESCRIPTION

Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area. Xen is an open source virtual machine monitor product. Xen's PV virtual machine has a security vulnerability when enabling hugetlbfs support, allowing an attacker to exploit this vulnerability to trigger an infinite loop of error pages for a denial of service attack. Xen is prone to a denial-of-service vulnerability. An attacker can exploit this issue to crash the kernel, resulting in a denial-of-service condition. ========================================================================== Ubuntu Security Notice USN-3002-1 June 10, 2016 linux-lts-wily vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-wily: Linux hardware enablement kernel from Wily for Trusty Details: Justin Yackoski discovered that the Atheros L2 Ethernet Driver in the Linux kernel incorrectly enables scatter/gather I/O. A remote attacker could use this to obtain potentially sensitive information from kernel memory. (CVE-2016-2117) Jann Horn discovered that eCryptfs improperly attempted to use the mmap() handler of a lower filesystem that did not implement one, causing a recursive page fault to occur. A local unprivileged attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-1583) Jason A. Donenfeld discovered multiple out-of-bounds reads in the OZMO USB over wifi device drivers in the Linux kernel. A remote attacker could use this to cause a denial of service (system crash) or obtain potentially sensitive information from kernel memory. (CVE-2015-4004) Ralf Spenneberg discovered that the Linux kernel's GTCO digitizer USB device driver did not properly validate endpoint descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2187) Hector Marco and Ismael Ripoll discovered that the Linux kernel would improperly disable Address Space Layout Randomization (ASLR) for x86 processes running in 32 bit mode if stack-consumption resource limits were disabled. A local attacker could use this to make it easier to exploit an existing vulnerability in a setuid/setgid program. (CVE-2016-3672) Andrey Konovalov discovered that the CDC Network Control Model USB driver in the Linux kernel did not cancel work events queued if a later error occurred, resulting in a use-after-free. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3951) It was discovered that an out-of-bounds write could occur when handling incoming packets in the USB/IP implementation in the Linux kernel. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-3955) Vitaly Kuznetsov discovered that the Linux kernel did not properly suppress hugetlbfs support in X86 paravirtualized guests. (CVE-2016-3961) Kangjie Lu discovered an information leak in the ANSI/IEEE 802.2 LLC type 2 Support implementations in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory. (CVE-2016-4485) Kangjie Lu discovered an information leak in the routing netlink socket interface (rtnetlink) implementation in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory. (CVE-2016-4486) Jann Horn discovered that the InfiniBand interfaces within the Linux kernel could be coerced into overwriting kernel memory. A local unprivileged attacker could use this to possibly gain administrative privileges on systems where InifiniBand related kernel modules are loaded. (CVE-2016-4565) It was discovered that in some situations the Linux kernel did not handle propagated mounts correctly. A local unprivileged attacker could use this to cause a denial of service (system crash). (CVE-2016-4581) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.2.0-38-generic 4.2.0-38.45~14.04.1 linux-image-4.2.0-38-generic-lpae 4.2.0-38.45~14.04.1 linux-image-4.2.0-38-lowlatency 4.2.0-38.45~14.04.1 linux-image-4.2.0-38-powerpc-e500mc 4.2.0-38.45~14.04.1 linux-image-4.2.0-38-powerpc-smp 4.2.0-38.45~14.04.1 linux-image-4.2.0-38-powerpc64-emb 4.2.0-38.45~14.04.1 linux-image-4.2.0-38-powerpc64-smp 4.2.0-38.45~14.04.1 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: http://www.ubuntu.com/usn/usn-3002-1 CVE-2015-4004, CVE-2016-1583, CVE-2016-2117, CVE-2016-2187, CVE-2016-3672, CVE-2016-3951, CVE-2016-3955, CVE-2016-3961, CVE-2016-4485, CVE-2016-4486, CVE-2016-4565, CVE-2016-4581 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-wily/4.2.0-38.45~14.04.1 . This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS. It was discovered that the compression handling code in the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel did not properly check for an integer overflow. (CVE-2014-9904) Kirill A. References: http://www.ubuntu.com/usn/usn-3127-1 CVE-2014-9904, CVE-2015-3288, CVE-2016-3961, CVE-2016-7042 Package Information: https://launchpad.net/ubuntu/+source/linux/3.13.0-101.148 --w/VI3ydZO+RcZ3Ux -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCgAGBQJYJZIfAAoJEC8Jno0AXoH0insP/jaaUxVzufGQH9ssk/AaERQY mV60G8AmRGNR7bhU6yT3d1ia/NgsB5a0aZZ/mXBM0O5bwFo2958Vc8QPrZPqMFWh aC/xgP/ahn+CMJLpGdlUSDX75QVlOwAjszKVFo4DmFGiNbOMabW55ApdI1/fYnWP qr9Ag3eJH393HSquBMha+pRJBbQ+sr1KO/WjnTsuFJy5YqU2h/g3LypM+F5AHgbr gOXkWKpWJd+v1EP/uI+/MuoNigKfOs8r00Nbv8gNN8v/txGI/kSx2fCn4/aYQIwY 6WcOeONFsiriqYfSAZRPONWeCu5Huawc1y9Zs06ksy/vvZoNH/6dSvUyE5SI+T7m clMYC54ZEwkwmIu73bi+V8Ceodl+wtDl053Ekw8DGHrSj6I5O4BYH/kn1eRBDrdm AWe9KrchnfVTIOeb0H0S8Nb1XT4TcYFhY9JaQYCGQ2VKhGudKLJnwa0Hp1/uG8lr BWK4lp7FYIZztbsVR1vgcAwLmsb9D8PGm96qvrzunw3U2aQCtWU/QGMqwcMPgnVG hWE8o/l8GvZ5Ca5hj3tuMRT0pkzsN2jJbMQaJfNRbopoqopffpccdxOBCWvBuCDN T0bHGA+OO7o0OYms1nSPE/COopTBOyYRtYLVh3XIG93pGqK6XbZT8Ze9swmrktPj i+0yvWd0c7yq7dhf1if9 =07Pv -----END PGP SIGNATURE----- --w/VI3ydZO+RcZ3Ux--

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

arbitrary

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Ubuntu

SOURCES

LAST UPDATE DATE

2025-06-26T19:50:37.529000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE