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Bug 668720 (CVE-2018-1121) - sys-process/procps: process hiding through race condition
Summary: sys-process/procps: process hiding through race condition
Status: CONFIRMED
Alias: CVE-2018-1121
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL: https://nvd.nist.gov/vuln/detail/CVE-...
Whiteboard: A4 [upstream cve]
Keywords:
Depends on:
Blocks:
 
Reported: 2018-10-15 16:10 UTC by Christopher Díaz Riveros (RETIRED)
Modified: 2018-11-25 03:23 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description Christopher Díaz Riveros (RETIRED) gentoo-dev Security 2018-10-15 16:10:32 UTC
Summary: 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.
Comment 1 Daniel Robbins 2018-10-21 03:35:37 UTC
Please note that GLSA 201805-14 gives the incorrect impression that following the steps in this GLSA will result in CVE-2018-1121 being addressed, when it hasn't
been yet.
Comment 2 Aaron Bauman Gentoo Infrastructure gentoo-dev Security 2018-11-25 03:23:52 UTC
(In reply to Daniel Robbins from comment #1)
> Please note that GLSA 201805-14 gives the incorrect impression that
> following the steps in this GLSA will result in CVE-2018-1121 being
> addressed, when it hasn't
> been yet.

Fixed in GLSA 201805-14.