JuniperCVELIST:CVE-2020-1668CVE-2020-1668 Junos OS: EX2300 Series: High CPU load due to receipt of specific multicast packets on layer 2 interface
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%
On Juniper Networks EX2300 Series, receipt of a stream of specific multicast packets by the layer2 interface can cause high CPU load, which could lead to traffic interruption. This issue occurs when multicast packets are received by the layer 2 interface. To check if the device has high CPU load due to this issue, the administrator can issue the following command: user@host> show chassis routing-engine Routing Engine status: … Idle 2 percent the “Idle” value shows as low (2 % in the example above), and also the following command: user@host> show system processes summary … PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND 11639 root 52 0 283M 11296K select 12:15 44.97% eventd 11803 root 81 0 719M 239M RUN 251:12 31.98% fxpc{fxpc} the eventd and the fxpc processes might use higher WCPU percentage (respectively 44.97% and 31.98% in the above example). This issue affects Juniper Networks Junos OS on EX2300 Series: 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2.
CNA Affected
[
{
"platforms": [
"EX2300 Series"
],
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "18.1R3-S11",
"status": "affected",
"version": "18.1",
"versionType": "custom"
},
{
"lessThan": "18.2R3-S5",
"status": "affected",
"version": "18.2",
"versionType": "custom"
},
{
"lessThan": "18.3R2-S4, 18.3R3-S3",
"status": "affected",
"version": "18.3",
"versionType": "custom"
},
{
"lessThan": "18.4R2-S5, 18.4R3-S4",
"status": "affected",
"version": "18.4",
"versionType": "custom"
},
{
"lessThan": "19.1R3-S2",
"status": "affected",
"version": "19.1",
"versionType": "custom"
},
{
"lessThan": "19.2R1-S5, 19.2R3",
"status": "affected",
"version": "19.2",
"versionType": "custom"
},
{
"lessThan": "19.3R2-S4, 19.3R3",
"status": "affected",
"version": "19.3",
"versionType": "custom"
},
{
"lessThan": "19.4R1-S3, 19.4R2-S1, 19.4R3",
"status": "affected",
"version": "19.4",
"versionType": "custom"
},
{
"lessThan": "20.1R1-S2, 20.1R2",
"status": "affected",
"version": "20.1",
"versionType": "custom"
}
]
}
]References
Related
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%