A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||5.3||Base Metrics:||AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H|
|Access Vector:||Network||Attack Complexity:||High|
|Privileges Required:||Low||User Interaction:||None|
|Integrity Impact:||None||Availability Impact:||High|
|Oracle Linux version 7 (kernel)||ELSA-2018-3083||2018-11-05|
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