JuniperCVE-2021-31379CVE-2021-31379
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
46.5%
An Incorrect Behavior Order vulnerability in the MAP-E automatic tunneling mechanism of Juniper Networks Junos OS allows an attacker to send certain malformed IPv4 or IPv6 packets to cause a Denial of Service (DoS) to the PFE on the device which is disabled as a result of the processing of these packets. Continued receipt and processing of these malformed IPv4 or IPv6 packets will create a sustained Denial of Service (DoS) condition. This issue only affects MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. An indicator of compromise is the output: FPC [“FPC ID” # e.g. “0”] PFE #{PFE ID # e.g. “1”] : Fabric Disabled Example: FPC 0 PFE #1 : Fabric Disabled when using the command: show chassis fabric fpcs An example of a healthy result of the command use would be: user@device-re1> show chassis fabric fpcs Fabric management FPC state: FPC 0 PFE #0 Plane 0: Plane enabled Plane 1: Plane enabled Plane 2: Plane enabled Plane 3: Plane enabled Plane 4: Plane enabled Plane 5: Plane enabled Plane 6: Plane enabled Plane 7: Plane enabled This issue affects: Juniper Networks Junos OS on MX Series with MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. 17.2 version 17.2R1 and later versions; 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R2-S6, 18.2R3-S3; 18.3 versions prior to 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R1-S8, 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S5, 19.3R3. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s1:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s2:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s3:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s4:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s5:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s6:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s7:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r1-s8:*:*:*:*:*:* |
| juniper | junos | 17.2 | cpe:2.3:o:juniper:junos:17.2:r2:*:*:*:*:*:* |
CNA Affected
[
{
"platforms": [
"MX Series"
],
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "17.2R1",
"status": "unaffected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThan": "17.2*",
"status": "affected",
"version": "17.2R1",
"versionType": "custom"
},
{
"lessThan": "17.3R3-S9",
"status": "affected",
"version": "17.3",
"versionType": "custom"
},
{
"lessThan": "17.4R2-S12, 17.4R3-S3",
"status": "affected",
"version": "17.4",
"versionType": "custom"
},
{
"lessThan": "18.1R3-S11",
"status": "affected",
"version": "18.1",
"versionType": "custom"
},
{
"lessThan": "18.2R2-S6, 18.2R3-S3",
"status": "affected",
"version": "18.2",
"versionType": "custom"
},
{
"lessThan": "18.3R2-S4, 18.3R3-S1",
"status": "affected",
"version": "18.3",
"versionType": "custom"
},
{
"lessThan": "18.4R1-S8, 18.4R2-S5, 18.4R3",
"status": "affected",
"version": "18.4",
"versionType": "custom"
},
{
"lessThan": "19.1R1-S6, 19.1R2-S2, 19.1R3",
"status": "affected",
"version": "19.1",
"versionType": "custom"
},
{
"lessThan": "19.2R1-S5, 19.2R2",
"status": "affected",
"version": "19.2",
"versionType": "custom"
},
{
"lessThan": "19.3R2-S5, 19.3R3",
"status": "affected",
"version": "19.3",
"versionType": "custom"
}
]
}
]Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
46.5%