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CVE-2017-7495

Status Candidate

Overview

fs/ext4/inode.c in the Linux kernel before 4.6.2, when ext4 data=ordered mode is used, mishandles a needs-flushing-before-commit list, which allows local users to obtain sensitive information from other users' files in opportunistic circumstances by waiting for a hardware reset, creating a new file, making write system calls, and reading this file.

Related Files

Kernel Live Patch Security Notice LSN-0029-1
Posted Aug 30, 2017
Authored by Benjamin M. Romer

It was discovered that the Linux kernel did not honor the UEFI secure boot mode when performing a kexec operation. A local attacker could use this to bypass secure boot restrictions. Huang Weller discovered that the ext4 filesystem implementation in the Linux kernel mishandled a needs-flushing-before-commit list. A local attacker could use this to expose sensitive information.

tags | advisory, kernel, local
systems | linux
advisories | CVE-2015-7837, CVE-2017-7495
MD5 | e1cdddf8c51cfb6dc9e25a8466744db4
Ubuntu Security Notice USN-3406-2
Posted Aug 29, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3406-2 - USN-3406-1 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 ESM. It was discovered that an out of bounds read vulnerability existed in the associative array implementation in the Linux kernel. A local attacker could use this to cause a denial of service or expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-7914, CVE-2017-7261, CVE-2017-7273, CVE-2017-7487, CVE-2017-7495, CVE-2017-7616
MD5 | bcb9b54a8a5556c6daf2c16f77e97ad7
Ubuntu Security Notice USN-3406-1
Posted Aug 28, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3406-1 - It was discovered that an out of bounds read vulnerability existed in the associative array implementation in the Linux kernel. A local attacker could use this to cause a denial of service or expose sensitive information. It was discovered that a NULL pointer dereference existed in the Direct Rendering Manager driver for VMWare devices in the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-7914, CVE-2017-7261, CVE-2017-7273, CVE-2017-7487, CVE-2017-7495, CVE-2017-7616
MD5 | ab3d93c5b082693198c7dd03e2550762
Ubuntu Security Notice USN-3405-2
Posted Aug 28, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3405-2 - USN-3405-1 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. It was discovered that a use-after-free vulnerability existed in the POSIX message queue implementation in the Linux kernel. 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, vulnerability
systems | linux, osx, ubuntu
advisories | CVE-2015-7837, CVE-2017-11176, CVE-2017-7495, CVE-2017-7541
MD5 | be8ba4251d1774d576a5d0cbdadc62c4
Ubuntu Security Notice USN-3405-1
Posted Aug 28, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3405-1 - It was discovered that a use-after-free vulnerability existed in the POSIX message queue implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Huang Weller discovered that the ext4 filesystem implementation in the Linux kernel mishandled a needs-flushing-before-commit list. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, osx, ubuntu
advisories | CVE-2015-7837, CVE-2017-11176, CVE-2017-7495, CVE-2017-7541
MD5 | 179b8f597770848ddee280743b07f0a7
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