Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.012
EPSS Ranking 77.7%
CVSS Severity
CVSS v3 Score 3.9
CVSS v2 Score 4.3
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
- 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
Products affected by CVE-2018-1121
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cpe:2.3:a:procps_project:procps:3.3.0
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cpe:2.3:a:procps_project:procps:3.3.1
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cpe:2.3:a:procps_project:procps:3.3.10
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cpe:2.3:a:procps_project:procps:3.3.11
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cpe:2.3:a:procps_project:procps:3.3.12
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cpe:2.3:a:procps_project:procps:3.3.13
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cpe:2.3:a:procps_project:procps:3.3.14
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cpe:2.3:a:procps_project:procps:3.3.15
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cpe:2.3:a:procps_project:procps:3.3.2
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cpe:2.3:a:procps_project:procps:3.3.3
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cpe:2.3:a:procps_project:procps:3.3.4
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cpe:2.3:a:procps_project:procps:3.3.5
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cpe:2.3:a:procps_project:procps:3.3.6
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cpe:2.3:a:procps_project:procps:3.3.7
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cpe:2.3:a:procps_project:procps:3.3.8
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cpe:2.3:a:procps_project:procps:3.3.9