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Vulnerability Details CVE-2019-13272

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.836
EPSS Ranking 99.2%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
Proposed Action
Kernel/ptrace.c in Linux kernel mishandles contains an improper privilege management vulnerability that allows local users to obtain root access.
Ransomware Campaign
Unknown
References
Products affected by CVE-2019-13272


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