JuniperCVE-2021-0259CVE-2021-0259
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
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
25.0%
Due to a vulnerability in DDoS protection in Juniper Networks Junos OS and Junos OS Evolved on QFX5K Series switches in a VXLAN configuration, instability might be experienced in the underlay network as a consequence of exceeding the default ddos-protection aggregate threshold. If an attacker on a client device on the overlay network sends a high volume of specific, legitimate traffic in the overlay network, due to an improperly detected DDoS violation, the leaf might not process certain L2 traffic, sent by spines in the underlay network. Continued receipt and processing of the high volume traffic will sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX5K Series: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R2-S8, 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R1-S2, 20.3R2. Juniper Networks Junos OS Evolved on QFX5220: All versions prior to 20.3R2-EVO.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r1:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r1-s4:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r2-s3:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r2-s4:*:*:*:*:*:* |
| juniper | junos | 17.3 | cpe:2.3:o:juniper:junos:17.3:r2-s5:*:*:*:*:*:* |
CNA Affected
[
{
"platforms": [
"QFX5K Series"
],
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "17.3R3-S11",
"status": "affected",
"version": "17.3",
"versionType": "custom"
},
{
"lessThan": "17.4R3-S5",
"status": "affected",
"version": "17.4",
"versionType": "custom"
},
{
"lessThan": "18.1R3-S13",
"status": "affected",
"version": "18.1",
"versionType": "custom"
},
{
"lessThan": "18.2R2-S8, 18.2R3-S8",
"status": "affected",
"version": "18.2",
"versionType": "custom"
},
{
"lessThan": "18.3R3-S5",
"status": "affected",
"version": "18.3",
"versionType": "custom"
},
{
"lessThan": "18.4R1-S8, 18.4R2-S6, 18.4R3-S6",
"status": "affected",
"version": "18.4",
"versionType": "custom"
},
{
"lessThan": "19.1R3-S4",
"status": "affected",
"version": "19.1",
"versionType": "custom"
},
{
"lessThan": "19.2R1-S6, 19.2R3-S2",
"status": "affected",
"version": "19.2",
"versionType": "custom"
},
{
"lessThan": "19.3R3-S2",
"status": "affected",
"version": "19.3",
"versionType": "custom"
},
{
"lessThan": "19.4R2-S4, 19.4R3-S1",
"status": "affected",
"version": "19.4",
"versionType": "custom"
},
{
"lessThan": "20.1R2",
"status": "affected",
"version": "20.1",
"versionType": "custom"
},
{
"lessThan": "20.2R2",
"status": "affected",
"version": "20.2",
"versionType": "custom"
},
{
"lessThan": "20.3R1-S2, 20.3R2",
"status": "affected",
"version": "20.3",
"versionType": "custom"
}
]
},
{
"platforms": [
"QFX5220"
],
"product": "Junos OS Evolved",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "20.3R2-EVO",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]References
Related
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
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
25.0%