CVE-2021-31374

Junos OS and Junos OS Evolved: RPD crash while processing a specially crafted BGP UPDATE or KEEPALIVE message.

State: Published
Severity: 7.5 High
Published: Oct 19, 2021
Updated: Sep 16, 2024
Reserved: Apr 15, 2021

Description

On Juniper Networks Junos OS and Junos OS Evolved devices processing a specially crafted BGP UPDATE or KEEPALIVE message can lead to a routing process daemon (RPD) crash and restart, causing a Denial of Service (DoS). Continued receipt and processing of this message will create a sustained Denial of Service (DoS) condition. This issue affects both IBGP and EBGP deployments over IPv4 or IPv6. This issue affects: Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R2-S13, 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S7; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1; 19.4 versions prior to 19.4R1-S4, 19.4R1-S4, 19.4R2-S3, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R1-S1, 20.3R2. Juniper Networks Junos OS Evolved: 20.3 versions prior to 20.3R2-EVO.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	juniper

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
Junos OSJuniper Networks	17.3 to before 17.3R3-S11Affected 17.4 to before 17.4R2-S13, 17.4R3-S4Affected 18.1 to before 18.1R3-S12Affected 18.2 to before 18.2R2-S8, 18.2R3-S7Affected 18.3 to before 18.3R3-S4Affected 18.4 to before 18.4R1-S8, 18.4R2-S7, 18.4R3-S7Affected 19.1 to before 19.1R1-S6, 19.1R2-S2, 19.1R3-S4Affected 19.2 to before 19.2R1-S6, 19.2R3-S1Affected 19.3 to before 19.3R2-S5, 19.3R3-S1Affected 19.4 to before 19.4R1-S4, 19.4R2-S3, 19.4R3-S1Affected 20.1 to before 20.1R2Affected 20.2 to before 20.2R2Affected 20.3 to before 20.3R1-S1, 20.3R2Affected
Junos OS EvolvedJuniper Networks	20.3 to before 20.3R2-EVOAffected

Product

Versions

Junos OSJuniper Networks

17.3 to before 17.3R3-S11Affected
17.4 to before 17.4R2-S13, 17.4R3-S4Affected
18.1 to before 18.1R3-S12Affected
18.2 to before 18.2R2-S8, 18.2R3-S7Affected
18.3 to before 18.3R3-S4Affected
18.4 to before 18.4R1-S8, 18.4R2-S7, 18.4R3-S7Affected
19.1 to before 19.1R1-S6, 19.1R2-S2, 19.1R3-S4Affected
19.2 to before 19.2R1-S6, 19.2R3-S1Affected
19.3 to before 19.3R2-S5, 19.3R3-S1Affected
19.4 to before 19.4R1-S4, 19.4R2-S3, 19.4R3-S1Affected
20.1 to before 20.1R2Affected
20.2 to before 20.2R2Affected
20.3 to before 20.3R1-S1, 20.3R2Affected

Junos OS EvolvedJuniper Networks

20.3 to before 20.3R2-EVOAffected

References

https://kb.juniper.net/JSA11239

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