PT-2019-16759 · Linux+3 · Linux Kernel+3
Publicado
2016-10-29
·
Atualizado
2023-02-12
·
CVE-2019-3901
CVSS v3.1
5.6
Média
| Vetor | AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.8
Description
A race condition in the
perf event open() function allows local attackers to leak sensitive data from setuid programs. This occurs because no relevant locks, specifically the cred guard mutex, are held during the ptrace may access() call. As a result, the target task can perform an execve() syscall with setuid execution before perf event alloc() attaches to it, bypassing the ptrace may access() check and the perf event exit task(current) call in install exec creds() during privileged execve() calls.Recommendations
For Linux kernel versions prior to 4.8, update to version 4.8 or later to resolve the issue.
Correção
Improper Locking
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Alt Linux
Centos
Linux Kernel
Red Hat