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CVE-2016-7042

Status Candidate

Overview

The proc_keys_show function in security/keys/proc.c in the Linux kernel through 4.8.2, when the GNU Compiler Collection (gcc) stack protector is enabled, uses an incorrect buffer size for certain timeout data, which allows local users to cause a denial of service (stack memory corruption and panic) by reading the /proc/keys file.

Related Files

Red Hat Security Advisory 2017-2669-01
Posted Sep 6, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2669-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted with attacker-controlled data, which may lead to the privilege escalation.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2015-8839, CVE-2016-10088, CVE-2016-7042, CVE-2016-7097, CVE-2016-8645, CVE-2016-9576, CVE-2016-9604, CVE-2016-9685, CVE-2016-9806, CVE-2017-2671, CVE-2017-5970, CVE-2017-6001, CVE-2017-6951, CVE-2017-7187, CVE-2017-7533, CVE-2017-7889, CVE-2017-8797, CVE-2017-8890, CVE-2017-9074, CVE-2017-9075, CVE-2017-9076, CVE-2017-9077
SHA-256 | e48d45b3299e25794baf01efaba70783d2cc37c96df4e1cb6cd794ff41e25ad0
Red Hat Security Advisory 2017-1842-01
Posted Aug 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1842-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: An use-after-free flaw was found in the Linux kernel which enables a race condition in the L2TPv3 IP Encapsulation feature. A local user could use this flaw to escalate their privileges or crash the system. A flaw was found that can be triggered in keyring_search_iterator in keyring.c if type->match is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2014-7970, CVE-2014-7975, CVE-2015-8839, CVE-2015-8970, CVE-2016-10088, CVE-2016-10147, CVE-2016-10200, CVE-2016-6213, CVE-2016-7042, CVE-2016-7097, CVE-2016-8645, CVE-2016-9576, CVE-2016-9588, CVE-2016-9604, CVE-2016-9685, CVE-2016-9806, CVE-2017-2596, CVE-2017-2647, CVE-2017-2671, CVE-2017-5970, CVE-2017-6001, CVE-2017-6951, CVE-2017-7187, CVE-2017-7616, CVE-2017-7889, CVE-2017-8797, CVE-2017-8890, CVE-2017-9074
SHA-256 | 5ca025049a9aeac274477f25b1f88d0c0690dadc0caf736cba30c2ebc58771e8
Red Hat Security Advisory 2017-2077-01
Posted Aug 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2077-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: An use-after-free flaw was found in the Linux kernel which enables a race condition in the L2TPv3 IP Encapsulation feature. A local user could use this flaw to escalate their privileges or crash the system. A flaw was found that can be triggered in keyring_search_iterator in keyring.c if type->match is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2014-7970, CVE-2014-7975, CVE-2015-8839, CVE-2015-8970, CVE-2016-10088, CVE-2016-10147, CVE-2016-10200, CVE-2016-6213, CVE-2016-7042, CVE-2016-7097, CVE-2016-8645, CVE-2016-9576, CVE-2016-9588, CVE-2016-9604, CVE-2016-9685, CVE-2016-9806, CVE-2017-2596, CVE-2017-2647, CVE-2017-2671, CVE-2017-5970, CVE-2017-6001, CVE-2017-6951, CVE-2017-7187, CVE-2017-7616, CVE-2017-7889, CVE-2017-8797, CVE-2017-8890, CVE-2017-9074
SHA-256 | d2c3180ea8e30c9c7a99dd568d556248785dfe383295b24d599dcc9aae61ff25
Red Hat Security Advisory 2017-0817-01
Posted Mar 21, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0817-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946.

tags | advisory, remote, arbitrary, kernel
systems | linux, redhat
advisories | CVE-2016-10088, CVE-2016-10142, CVE-2016-2069, CVE-2016-2384, CVE-2016-6480, CVE-2016-7042, CVE-2016-7097, CVE-2016-8399, CVE-2016-9576
SHA-256 | 597c633d164dd5b659055724a7f94dfa6104bd1ddf58babc8fd4e61d37290908
Ubuntu Security Notice USN-3161-3
Posted Dec 20, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3161-3 - Tilman Schmidt and Sasha Levin discovered a use-after-free condition in the TTY implementation in the Linux kernel. A local attacker could use this to expose sensitive information. It was discovered that the Video For Linux Two implementation in the Linux kernel did not properly handle multiple planes when processing a VIDIOC_DQBUF ioctl. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-8964, CVE-2016-4568, CVE-2016-6213, CVE-2016-7042, CVE-2016-7097, CVE-2016-7425, CVE-2016-8630, CVE-2016-8633, CVE-2016-8645, CVE-2016-8658, CVE-2016-9178, CVE-2016-9555
SHA-256 | 3b72c509222788127c3449442ce79d5f2bb6a03e63fee7e3522725b77a66b344
Kernel Live Patch Security Notice LSN-0013-1
Posted Nov 30, 2016
Authored by Luis Henriques

Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service (system crash). Dmitry Vyukov discovered a use-after-free vulnerability during error processing in the recvmmsg(2) implementation in the Linux kernel. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other kernel vulnerabilities were also discovered and addressed.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel, local, vulnerability
systems | linux
advisories | CVE-2016-7042, CVE-2016-7117, CVE-2016-7425, CVE-2016-8658
SHA-256 | 5eae3cc7ae9949b636e16234a44d66f6ecfbbb7d410b77b7636cc74cb28cfc31
Ubuntu Security Notice USN-3129-2
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3129-2 - Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7042
SHA-256 | a29f0d3e3e2ebd12adeba1d4689ca7d3c299aeea87e2ec97e3512daef8e67939
Ubuntu Security Notice USN-3128-2
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3128-2 - USN-3128-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-7042
SHA-256 | bb5f7821787ec046a4f18c437fee1c4babaada3a07138c01ab7433aba49a6459
Ubuntu Security Notice USN-3127-1
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3127-1 - It was discovered that the compression handling code in the Advanced Linux Sound Architecture subsystem in the Linux kernel did not properly check for an integer overflow. A local attacker could use this to cause a denial of service. Kirill A. Shutemov discovered that memory manager in the Linux kernel did not properly handle anonymous pages. A local attacker could use this to cause a denial of service or possibly gain administrative privileges. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-9904, CVE-2015-3288, CVE-2016-3961, CVE-2016-7042
SHA-256 | 01cea1fce1227c7940b3e746c63d4a2d4b996f91e65b161b9da444fd843eb62d
Ubuntu Security Notice USN-3129-1
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3129-1 - Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7042
SHA-256 | dd14ea01c353f7c9b48c2adcbf07fa50f6b0a15a6a46ca85b0d9700963342534
Ubuntu Security Notice USN-3128-3
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3128-3 - Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7042
SHA-256 | 913ba46b3ae9d9c566f6d8b725cbdaf54e98cc4d79e03714bb9f79f51f89d7ab
Ubuntu Security Notice USN-3126-1
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3126-1 - Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service. Dmitry Vyukov discovered a use-after-free vulnerability during error processing in the recvmmsg implementation in the Linux kernel. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7042, CVE-2016-7117
SHA-256 | 4bbf1d4ea527ad684dcc5fc5db86dbe5395379408e2920a2bad340c35edb6728
Ubuntu Security Notice USN-3128-1
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3128-1 - Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7042
SHA-256 | fa0fb5c655ad6f62fb22e8029251c9321a38dba3f9f91c5f204325d1b11eb9d1
Ubuntu Security Notice USN-3127-2
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3127-2 - USN-3127-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement 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 subsystem in the Linux kernel did not properly check for an integer overflow. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-9904, CVE-2015-3288, CVE-2016-3961, CVE-2016-7042
SHA-256 | 7ef8e046784e759daa37ac14a887334035715f84aedb6b85a0db639ce1c7fa5e
Ubuntu Security Notice USN-3126-2
Posted Nov 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3126-2 - Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service. Dmitry Vyukov discovered a use-after-free vulnerability during error processing in the recvmmsg implementation in the Linux kernel. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7042, CVE-2016-7117
SHA-256 | 4ccc284737a64c8c3f06bc96c110403bf3c05592a73bbe558b184db66d8d1d08
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