CVE-2018-1121

low-risk
Published 2018-06-13

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.

Do I need to act?

~
2.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
44806
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.9/10 Low
LOCAL / LOW complexity

Affected Products (1)

Procps

Affected Vendors

Procps Project

References (10)

Exploit http://seclists.org/oss-sec/2018/q2/122
Third Party Advisory http://www.securityfocus.com/bid/104214
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121
Exploit https://www.exploit-db.com/exploits/44806/
Exploit https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt
Exploit http://seclists.org/oss-sec/2018/q2/122
Third Party Advisory http://www.securityfocus.com/bid/104214
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121
Exploit https://www.exploit-db.com/exploits/44806/
Exploit https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt
24
/ 100
low-risk
Severity 14/34 · Moderate
Exploitability 5/34 · Minimal
Exposure 5/34 · Minimal