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CVE-2019-13272

Status Candidate

Overview

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. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.

Related Files

Ubuntu Security Notice USN-4093-1
Posted Aug 13, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu 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.

tags | advisory, denial of service, overflow, arbitrary, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-10126, CVE-2019-1125, CVE-2019-12614, CVE-2019-12984, CVE-2019-13233, CVE-2019-13272, CVE-2019-3846
MD5 | c0b6be2dc1ffa0bcd5add84b3fac57df
Ubuntu Security Notice USN-4095-1
Posted Aug 13, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu 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.

tags | advisory, denial of service, overflow, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2018-5383, CVE-2019-10126, CVE-2019-1125, CVE-2019-11599, CVE-2019-12614, CVE-2019-13272, CVE-2019-3846
MD5 | ff726cc76288b070879d39966cb18209
Ubuntu Security Notice USN-4094-1
Posted Aug 13, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu 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.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-13053, CVE-2018-13093, CVE-2018-13096, CVE-2018-13098, CVE-2018-13099, CVE-2018-13100, CVE-2018-14609, CVE-2018-14610, CVE-2018-14613, CVE-2018-14614, CVE-2018-14617, CVE-2018-16862, CVE-2018-20169, CVE-2018-20511, CVE-2018-20856, CVE-2018-5383, CVE-2019-10126, CVE-2019-1125, CVE-2019-12614, CVE-2019-12818, CVE-2019-12819, CVE-2019-12984, CVE-2019-13233, CVE-2019-13272, CVE-2019-2024, CVE-2019-2101, CVE-2019-3846
MD5 | 3b73671d729375d8de90582cb3d31f24
Red Hat Security Advisory 2019-2411-01
Posted Aug 7, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2411-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-1125, CVE-2019-13272
MD5 | db66a27f852a52baa108fabfac35e8d7
Red Hat Security Advisory 2019-2405-01
Posted Aug 7, 2019
Authored by Red Hat | Site access.redhat.com

Red 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.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-1125, CVE-2019-13272
MD5 | d0c6124bb4ce80f52013703fac6b4127
Slackware Security Advisory - Slackware 14.2 kernel Updates
Posted Jul 22, 2019
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New kernel packages are available for Slackware 14.2 to fix security issues.

tags | advisory, kernel
systems | linux, slackware
advisories | CVE-2018-16597, CVE-2019-10126, CVE-2019-11599, CVE-2019-13272, CVE-2019-3846, CVE-2019-3892
MD5 | dcc164dee87e520c21919a34673ad54b
Debian Security Advisory 4484-1
Posted Jul 20, 2019
Authored by Debian | Site debian.org

Debian 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.

tags | advisory, kernel, local, root
systems | linux, debian
advisories | CVE-2019-13272
MD5 | 492216f4fa5e3ebcc3b8f8c6ba353108
Linux PTRACE_TRACEME Broken Permission / Object Lifetime Handling
Posted Jul 16, 2019
Authored by Jann Horn, Google Security Research

Linux suffers from broken permission and object lifetime handling for PTRACE_TRACEME.

tags | exploit
systems | linux
advisories | CVE-2019-13272
MD5 | 91c78e7e5a824d9c7ed235f47eecb190
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