Linux kernel version 5.1.x PTRACE_TRACEME pkexec local privilege escalation exploit.
8d5c414fa51cc67f0202260354e046cc0dfc7b5fd8dbc677b42d007fa51ef016Linux kernel versions starting at 4.10 and below 5.1.7 PTRACE_TRACEME local root exploit that uses the pkexec technique.
e7f854bf4bfbbd6ef656848e475779ed5d37f0342d90b357fbfff5954374bb40This Metasploit module exploits an issue in ptrace_link in kernel/ptrace.c before Linux kernel 5.1.17. This issue can be exploited from a Linux desktop terminal, but not over an SSH session, as it requires execution from within the context of a user with an active Polkit agent. In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME.
072effef6153caac38d664913a4c85d900178cc8a6bc497726bd11fee5a2a0bcRed Hat Security Advisory 2019-2809-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include null pointer and use-after-free vulnerabilities.
065fb6804a32c763981ec09f0933ce0630e20b3bed1485d5fd86a3a94081c7d1Ubuntu Security Notice 4117-1 - It was discovered that a heap buffer overflow existed in the Marvell Wireless LAN device driver for the Linux kernel. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Amit Klein and Benny Pinkas discovered that the Linux kernel did not sufficiently randomize IP ID values generated for connectionless networking protocols. A remote attacker could use this to track particular Linux devices. Various other issues were also addressed.
08931d3a174297788ef3a8a0259a69406ef81389b33e15ab37700c7d4e440f45It was discovered that the USB video device class implementation in the Linux kernel did not properly validate control bits, resulting in an out of bounds buffer read. A local attacker could use this to possibly expose sensitive information (kernel memory). It was discovered that the Marvell Wireless LAN device driver in the Linux kernel did not properly validate the BSS descriptor. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other vulnerabilities have also been addressed.
3bf6f3467455c33428751c5faf437aa7d6c64fe01342c90cc65e1d94808e2336Ubuntu Security Notice 4093-1 - It was discovered that a heap buffer overflow existed in the Marvell Wireless LAN device driver for the Linux kernel. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors incorrectly handle SWAPGS instructions during speculative execution. A local attacker could use this to expose sensitive information. Various other issues were also addressed.
972368dcf6177d5f57f6c9563b2ca592739590e4dce2d1505555c8bf5670da14Ubuntu Security Notice 4095-1 - Eli Biham and Lior Neumann discovered that the Bluetooth implementation in the Linux kernel did not properly validate elliptic curve parameters during Diffie-Hellman key exchange in some situations. An attacker could use this to expose sensitive information. It was discovered that a heap buffer overflow existed in the Marvell Wireless LAN device driver for the Linux kernel. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
73242072359d7bf186617f05dbb4e22278a6357ede250b31c563407ebd584e49Ubuntu Security Notice 4094-1 - It was discovered that the alarmtimer implementation in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. Various other issues were also addressed.
057991c54bda99e36e45617061b5319a3d5749216d070d59b5d605ff61ea7dccRed Hat Security Advisory 2019-2411-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.
047d05f784457ec09bc3083cf9e694ae3aac8eded39bd2eb1e1ea51dff7ade8aRed Hat Security Advisory 2019-2405-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
412c1c44ac3d87cbbad738856106f7406cb4301044d240cb7523bedeafb903e9Slackware Security Advisory - New kernel packages are available for Slackware 14.2 to fix security issues.
eaf1386a913b81696db65328fdebb33b9ed751d8ee87000e03613ee7ec8b2e5fDebian Linux Security Advisory 4484-1 - Jann Horn discovered that the ptrace subsystem in the Linux kernel mishandles the management of the credentials of a process that wants to create a ptrace relationship, allowing a local user to obtain root privileges under certain scenarios.
f9eb27ffe2fd4a5b01dda4f4541e92421403c124e205baa16698ce8353887e1eLinux suffers from broken permission and object lifetime handling for PTRACE_TRACEME.
30dafcd01fe3416a51e40e4a4f49ab60f981e89f93b9635b6199d3e4fa21fde9
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