SARA / Free Tools / CVE / CVE-2018-1121

CVE-2018-1121 — procps-ng, procps is vulnerable to a process hiding through race condition

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 fo

CVSS
3.9 LOW
EPSS
1.88% (top 17.00%)
CWE
CWE-367
Published
2018-06-13T20:00:00.000Z
Last modified
2024-08-05T03:51:48.742Z
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

01What is this vulnerability?

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…

02Affected products

VendorProductVersions
[UNKNOWN]procpsng, procps — up to procps-ng 3.3.15 and newer

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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