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.
References
| Link | Resource |
|---|---|
| https://kb.juniper.net/JSA11247 | Exploit Mitigation Vendor Advisory |
| https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html | Vendor Advisory |
| https://kb.juniper.net/JSA11247 | Exploit Mitigation Vendor Advisory |
| https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html | Vendor Advisory |
Configurations
Configuration 1 (hide)
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History
21 Nov 2024, 06:05
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://kb.juniper.net/JSA11247 - Exploit, Mitigation, Vendor Advisory | |
| References | () https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html - Vendor Advisory |
Information
Published : 2021-10-19 19:15
Updated : 2024-11-21 06:05
NVD link : CVE-2021-31379
Mitre link : CVE-2021-31379
CVE.ORG link : CVE-2021-31379
JSON object : View
Products Affected
juniper
- mx2008
- mx40
- mx150
- mx10016
- mx5
- mx960
- mx10008
- mx80
- mx10000
- mx10
- junos
- mx104
- mx10003
- mx2020
- mx2010
- mx240
- mx480
- mx204
CWE