Improper Locking Affecting kernel-bootwrapper package, versions <0:3.10.0-957.56.1.el7
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Test your applications- Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-4892734
- published 26 Jul 2021
- disclosed 25 Apr 2016
Introduced: 25 Apr 2016
CVE-2019-3901 Open this link in a new tabHow to fix?
Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-957.56.1.el7 or higher.
This issue was patched in RHSA-2020:2851.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-bootwrapper package and not the kernel-bootwrapper package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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.
References
- http://www.securityfocus.com/bid/89937
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901
- https://security.netapp.com/advisory/ntap-20190517-0005/
- https://access.redhat.com/security/cve/CVE-2019-3901
- https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
- https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
- https://access.redhat.com/errata/RHSA-2020:2851
- https://bugzilla.redhat.com/show_bug.cgi?id=1701245