CVE-2018-1121 Details
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121 | CVE | Issue TrackingThird Party Advisory |
| http://seclists.org/oss-sec/2018/q2/122 | CVE | ExploitMailing ListThird Party Advisory |
| https://www.exploit-db.com/exploits/44806/ | CVE | ExploitThird Party AdvisoryVDB Entry |
| https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt | CVE | ExploitThird Party Advisory |
| http://www.securityfocus.com/bid/104214 | CVE | Third Party AdvisoryVDB Entry |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121 | [email protected] | Issue TrackingThird Party Advisory |
| http://seclists.org/oss-sec/2018/q2/122 | [email protected] | ExploitMailing ListThird Party Advisory |
| https://www.exploit-db.com/exploits/44806/ | [email protected] | ExploitThird Party AdvisoryVDB Entry |
| https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt | [email protected] | ExploitThird Party Advisory |
| http://www.securityfocus.com/bid/104214 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-362 | Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | [email protected] |
| CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| procps project procps | <= 3.3.15 |
CPE
Remediation
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Change History
9 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Jun 30, 2020 | CVE Modified | [email protected] |
| Oct 9, 2019 | CVE Modified | [email protected] |
| Mar 29, 2019 | Modified Analysis | [email protected] |
| Oct 21, 2018 | CVE Modified | [email protected] |
| Aug 10, 2018 | Initial Analysis | [email protected] |
| Jun 15, 2018 | CVE Modified | [email protected] |