CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
25.0%
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.
Vendor | Product | Version | CPE |
---|---|---|---|
juniper | junos_os_evolved | 19.4 | cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:* |
juniper | junos_os_evolved | 19.4 | cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:* |
juniper | junos_os_evolved | 19.4 | cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:* |
juniper | junos_os_evolved | 19.4 | cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s2:*:*:*:*:*:* |
juniper | junos_os_evolved | 20.1 | cpe:2.3:o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:* |
juniper | junos_os_evolved | 20.1 | cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:* |
juniper | junos_os_evolved | 20.1 | cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:* |
juniper | junos_os_evolved | 20.1 | cpe:2.3:o:juniper:junos_os_evolved:20.1:r2:*:*:*:*:*:* |
juniper | junos_os_evolved | 20.1 | cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s1:*:*:*:*:*:* |
juniper | junos_os_evolved | 20.1 | cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s2:*:*:*:*:*:* |
[
{
"product": "Junos OS Evolved",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "19.4R2-EVO",
"status": "unaffected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThan": "19.4R2-S3-EVO",
"status": "affected",
"version": "19.4",
"versionType": "custom"
},
{
"lessThan": "20.1R2-S4-EVO",
"status": "affected",
"version": "20.1",
"versionType": "custom"
},
{
"lessThan": "20.2*",
"status": "affected",
"version": "20.2R1-EVO",
"versionType": "custom"
}
]
}
]
More
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
25.0%