Vulnerability Name:

CVE-2018-1121

Assigned:2017-12-04
Published:2018-05-17
Updated:2018-08-10
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.
CVSS v3 Severity:5.9 Medium (CVSS v3 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
5.2 Medium (Temporal CVSS v3 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
4.3 Medium (CCN CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
3.8 Low (CCN Temporal CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-362
References:Source: MLIST
Type: VENDOR_ADVISORY
[oss-security] 20180517 Qualys Security Advisory - Procps-ng Audit Report

Source: BID
Type: VENDOR_ADVISORY
104214

Source: CONFIRM
Type: VENDOR_ADVISORY
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121

Source: XF
Type: UNKNOWN
procpsng-cve20181121-dos(143451)

Source: EXPLOIT-DB
Type: VENDOR_ADVISORY
44806

Source: MISC
Type: VENDOR_ADVISORY
https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt

Vulnerable Configuration:Configuration 1:
  • cpe:/a:procps__project:procps:3.3.15:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.artful:def:20181121000
    V
    CVE-2018-1121 on Ubuntu 17.10 (artful) - low.
    2018-06-13
    oval:com.ubuntu.trusty:def:20181121000
    V
    CVE-2018-1121 on Ubuntu 14.04 LTS (trusty) - low.
    2018-06-13
    oval:com.ubuntu.xenial:def:20181121000
    V
    CVE-2018-1121 on Ubuntu 16.04 LTS (xenial) - low.
    2018-06-13
    BACK
    procps__project procps 3.3.15