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CVE-2016-2085

Status Candidate

Overview

The evm_verify_hmac function in security/integrity/evm/evm_main.c in the Linux kernel before 4.5 does not properly copy data, which makes it easier for local users to forge MAC values via a timing side-channel attack.

Related Files

Ubuntu Security Notice USN-2948-2
Posted Apr 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2948-2 - USN-2948-1 fixed vulnerabilities in the Ubuntu 14.10 Linux kernel backported to Ubuntu 14.04 LTS. An incorrect reference counting fix in the radeon driver introduced a regression that could cause a system crash. This update fixes the problem. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2015-7566, CVE-2015-7833, CVE-2015-8812, CVE-2016-0723, CVE-2016-2085, CVE-2016-2550, CVE-2016-2782, CVE-2016-2847
MD5 | 5c17b65739eeafa8100fd2d5b61e29cd
Ubuntu Security Notice USN-2947-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2947-1 - Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847
MD5 | 7f8d276ab1bcacf6531e981a8caaaa88
Ubuntu Security Notice USN-2946-2
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2946-2 - Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847
MD5 | e5ebcd50a315488a0a8b39da6398875e
Ubuntu Security Notice USN-2949-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2949-1 - Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847
MD5 | 84f9564256e007e72b152a58a847819e
Ubuntu Security Notice USN-2948-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2948-1 - Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2015-7566, CVE-2015-7833, CVE-2015-8812, CVE-2016-0723, CVE-2016-2085, CVE-2016-2550, CVE-2016-2782, CVE-2016-2847
MD5 | 4794ccd656a00f0bf2fd35549669da59
Ubuntu Security Notice USN-2947-3
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2947-3 - Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847
MD5 | ddc30adb3f8890bffbbbc6384be9b37e
Ubuntu Security Notice USN-2946-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2946-1 - Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847
MD5 | f833ce635d4db0740ffe7ac091f82d8e
Ubuntu Security Notice USN-2947-2
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2947-2 - Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847
MD5 | 1fdf13f0942372dab8b2d0bfb4c7f82b
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