CVE-2018-1121

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.

Score

CVSS 3.0 5.9 Medium

Status

Modified - secalert@redhat.com

Published

2018-06-13

Last modified

2024-08-05

Weaknesses

CWE-362, CWE-367

Affected products

• Procps (Procps Project)
• Procps (Unknown)
• Procps-ng (Unknown)

References

• 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