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CVE-2018-18445

Status Candidate

Overview

In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.

Related Files

Ubuntu Security Notice USN-3847-3
Posted Dec 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3847-3 - USN-3847-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 LTS. It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. 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, ubuntu
advisories | CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710
MD5 | b186fc2a923abf5659c017b5ea42a3c3
Kernel Live Patch Security Notice LSN-0046-1
Posted Dec 20, 2018
Authored by Benjamin M. Romer

It was discovered that an integer overflow vulnerability existed in the CDRom driver of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. 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, overflow, arbitrary, kernel, local
systems | linux
advisories | CVE-2017-5753, CVE-2018-10880, CVE-2018-10902, CVE-2018-14734, CVE-2018-16276, CVE-2018-16658, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710, CVE-2018-9363
MD5 | 62b6f4b7e6e1fd65e163f970baba56dc
Ubuntu Security Notice USN-3847-2
Posted Dec 20, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3847-2 - USN-3847-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. 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, ubuntu
advisories | CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710
MD5 | b0c6ce592d43ca8552efd6262de2cbbb
Ubuntu Security Notice USN-3847-1
Posted Dec 20, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3847-1 - It was discovered that a race condition existed in the raw MIDI driver for the Linux kernel, leading to a double free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that an integer overrun vulnerability existed in the POSIX timers implementation 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, overflow, arbitrary, kernel, local
systems | linux, osx, ubuntu
advisories | CVE-2018-10902, CVE-2018-12896, CVE-2018-14734, CVE-2018-16276, CVE-2018-18445, CVE-2018-18690, CVE-2018-18710
MD5 | 5703c2f44fdffc67aa1c3e986372d1a0
Ubuntu Security Notice USN-3835-1
Posted Dec 4, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3835-1 - Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. Jann Horn discovered that the mremap system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service , expose sensitive information, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-17972, CVE-2018-18281, CVE-2018-18445, CVE-2018-18653, CVE-2018-18955, CVE-2018-6559
MD5 | 797f806913c130a0d4051adda370818d
Ubuntu Security Notice USN-3832-1
Posted Nov 30, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3832-1 - Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. Jann Horn discovered that the mremap system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service , expose sensitive information, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-17972, CVE-2018-18281, CVE-2018-18445, CVE-2018-18653, CVE-2018-18955, CVE-2018-6559
MD5 | e6fcaa3ecb5ddac3d3d7836f6838675e
Linux BPF Verifier Failed Truncation
Posted Oct 18, 2018
Authored by Jann Horn, Google Security Research

The Linux BPF verifier has an issue where 32-bit RSH verification does not truncate input before the ALU op.

tags | advisory
systems | linux
advisories | CVE-2018-18445
MD5 | 373edc458d7e0a3a57e28573408ae811
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