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Ubuntu: (CVE-2019-3901): linux vulnerability

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Ubuntu: (CVE-2019-3901): linux vulnerability

Severity
2
CVSS
(AV:L/AC:M/Au:N/C:P/I:N/A:N)
Published
04/22/2019
Created
11/21/2024
Added
11/19/2024
Modified
11/27/2024

Description

A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs. As no relevant locks (in particular the cred_guard_mutex) are held during the ptrace_may_access() call, it is possible for the specified target task to perform an execve() syscall with setuid execution before perf_event_alloc() actually attaches to it, allowing an attacker to bypass the ptrace_may_access() check and the perf_event_exit_task(current) call that is performed in install_exec_creds() during privileged execve() calls. This issue affects kernel versions before 4.8.

Solution(s)

  • ubuntu-upgrade-linux
  • ubuntu-upgrade-linux-lts-xenial
  • ubuntu-upgrade-linux-raspi2
  • ubuntu-upgrade-linux-snapdragon

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