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CVE-2021-0292

CVE information

Published

1 year ago

Last Modified

1 year ago

CVSSv2.0 Severity

Low

CVSSv3.1 Severity

Medium

Impact Analysis

Description

An Uncontrolled Resource Consumption vulnerability in the ARP daemon (arpd) and Network Discovery Protocol (ndp) process of Juniper Networks Junos OS Evolved allows a malicious attacker on the local network to consume memory resources, ultimately resulting in a Denial of Service (DoS) condition. Link-layer functions such as IPv4 and/or IPv6 address resolution may be impacted, leading to traffic loss. The processes do not recover on their own and must be manually restarted. Changes in memory usage can be monitored using the following shell commands (header shown for clarity): user@router:/var/log# ps aux | grep arpd USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 31418 59.0 0.7 *5702564* 247952 ? xxx /usr/sbin/arpd --app-name arpd -I object_select --shared-objects-mode 3 user@router:/var/log# ps aux | grep arpd USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 31418 49.1 1.0 *5813156* 351184 ? xxx /usr/sbin/arpd --app-name arpd -I object_select --shared-objects-mode 3 Memory usage can be monitored for the ndp process in a similar fashion: user@router:/var/log# ps aux | grep ndp USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 14935 0.0 0.1 *5614052* 27256 ? Ssl Jun15 0:17 /usr/sbin/ndp -I no_tab_chk,object_select --app-name ndp --shared-obje user@router:/var/log# ps aux | grep ndp USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 14935 0.0 0.1 *5725164* 27256 ? Ssl Jun15 0:17 /usr/sbin/ndp -I no_tab_chk,object_select --app-name ndp --shared-obje This issue affects Juniper Networks Junos OS Evolved: 19.4 versions prior to 19.4R2-S3-EVO; 20.1 versions prior to 20.1R2-S4-EVO; all versions of 20.2-EVO. This issue does not affect Juniper Networks Junos OS Evolved versions prior to 19.4R2-EVO..

CVSSv2.0 Score

Severity
Low
Base Score
3.3/10
Exploit Score
6.5/10
Access Vector
Adjacent_network
Access Complexity
Low
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
Partial
Integrity Impact
None

CVSSv3.1 Score

Severity
Medium
Base Score
6.5/10
Exploit Score
2.8/10
Access Vector
Adjacent_network
Access Complexity
Low
Privileges Required
None
Impact Score
3.6/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s3:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.2:-:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s2:*:*:*:*:*:*
  Yes
- -