CVE-2018-1121 Information

Description

procps-ng procps is vulnerable to a process hiding through race condition. Since the kernel’s proc_pid_readdir() returns PID entries in ascending numeric order a process occupying a high PID can use inotify events to determine when the process list is being scanned and fork/exec to obtain a lower PID thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng’s utilities by exploiting a race condition in reading /proc/PID entries. This vulnerability affects procps and procps-ng up to version 3.3.15 newer versions might be affected also.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

http://seclists.org/oss-sec/2018/q2/122 http://www.securityfocus.com/bid/104214 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121 https://www.exploit-db.com/exploits/44806/ https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.9