CVE-2020-1644

Junos OS and Junos OS Evolved: RPD crash due to specific BGP UPDATE packets

HIGH

7.5

CVSS Score

Published: July 17, 2020 at 06:40 PM UTC

Updated: June 17, 2026 at 03:02 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

Description

On Juniper Networks Junos OS and Junos OS Evolved devices, the receipt of a specific BGP UPDATE packet causes an internal counter to be incremented incorrectly, which over time can lead to the routing protocols process (RPD) crash and restart. This issue affects both IBGP and EBGP multihop deployment in IPv4 or IPv6 network. This issue affects: Juniper Networks Junos OS: 17.2X75 versions prior to 17.2X75-D105.19; 17.3 versions prior to 17.3R3-S8; 17.4 versions prior to 17.4R2-S10, 17.4R3-S2; 18.1 versions prior to 18.1R3-S10; 18.2 versions prior to 18.2R2-S7, 18.2R3-S4; 18.2X75 versions prior to 18.2X75-D13, 18.2X75-D411.1, 18.2X75-D420.18, 18.2X75-D52.3, 18.2X75-D60; 18.3 versions prior to 18.3R2-S4, 18.3R3-S2; 18.4 versions prior to 18.4R1-S7, 18.4R2-S4, 18.4R3-S2; 19.1 versions prior to 19.1R1-S5, 19.1R2-S1, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S2, 19.3R3; 19.4 versions prior to 19.4R1-S2, 19.4R2. Juniper Networks Junos OS Evolved: any releases prior to 20.1R2-EVO. This issue does not affect Juniper Networks Junos OS releases prior to 17.3R1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos OS Evolved · Juniper

95%

18.3 r1 19.1 r1 19.1 r2 19.2 r1 19.2 r2 19.3 r1 19.3 r2 20.1 r1

Junos · Juniper Networks

95%

17.2X75 ≤ v < 17.2X75-D105.1917.3 ≤ v < 17.3R3-S817.4 ≤ v < 17.4R2-S10, 17.4R3-S218.1 ≤ v < 18.1R3-S1018.2 ≤ v < 18.2R2-S7, 18.2R3-S418.2X75 ≤ v < 18.2X75-D13, 18.2X75-D411.1, 18.2X75-D420.18, 18.2X75-D52.3, 18.2X75-D6018.3 ≤ v < 18.3R2-S4, 18.3R3-S218.4 ≤ v < 18.4R1-S7, 18.4R2-S4, 18.4R3-S219.1 ≤ v < 19.1R1-S5, 19.1R2-S1, 19.1R319.2 ≤ v < 19.2R1-S5, 19.2R219.3 ≤ v < 19.3R2-S2, 19.3R319.4 ≤ v < 19.4R1-S2, 19.4R217.2X7517.2x7517.2x75 d102 17.2x75 d50 17.2x75 d70 17.2x75 d92 17.3 17.3 r1-s1 17.3 r2 17.3 r2-s1 17.3 r2-s2 17.3 r2-s3 17.3 r2-s4 17.3 r3 17.3 r3-s1 17.3 r3-s2 17.3 r3-s3 17.3 r3-s4 17.3 r3-s7 17.4 17.4 r1 17.4 r1-s1 17.4 r1-s2 17.4 r1-s4 17.4 r1-s5 17.4 r1-s6 17.4 r1-s7 17.4 r2 17.4 r2-s1 17.4 r2-s2 17.4 r2-s3 17.4 r2-s4 17.4 r2-s5 17.4 r2-s6 17.4 r2-s7 17.4 r2-s8 17.4 r2-s9 17.4 r3 17.4 r3-s1 18.1 18.1 r1 18.1 r2 18.1 r2-s1 18.1 r2-s2 18.1 r2-s4 18.1 r3 18.1 r3-s1 18.1 r3-s2 18.1 r3-s3 18.1 r3-s4 18.1 r3-s6 18.1 r3-s7 18.1 r3-s8 18.1 r3-s9 18.2 18.2 r1 18.2 r1-s3 18.2 r1-s4 18.2 r1-s5 18.2 r2 18.2 r2-s1 18.2 r2-s2 18.2 r2-s3 18.2 r2-s4 18.2 r2-s5 18.2 r2-s6 18.2 r3 18.2 r3-s1 18.2 r3-s2 18.2 r3-s3 18.2X7518.2x7518.2x75 d20 18.2x75 d30 18.2x75 d40 18.3 18.3 r1 18.3 r1-s1 18.3 r1-s2 18.3 r1-s3 18.3 r1-s5 18.3 r1-s6 18.3 r2 18.3 r2-s1 18.3 r2-s2 18.3 r2-s3 18.3 r3 18.3 r3-s1 18.4 18.4 r1 18.4 r1-s1 18.4 r1-s2 18.4 r1-s5 18.4 r1-s6 18.4 r2 18.4 r2-s1 18.4 r2-s2 18.4 r2-s3 18.4 r3 18.4 r3-s1 19.1 19.1 r1 19.1 r1-s1 19.1 r1-s2 19.1 r1-s3 19.1 r1-s4 19.1 r2 19.2 19.2 r1 19.2 r1-s1 19.2 r1-s2 19.2 r1-s3 19.2 r1-s4 19.3 19.3 r1 19.3 r1-s1 19.3 r2 19.3 r2-s1 19.4 19.4 r1 19.4 r1-s1

Affected range stops below 17.2X75-D105.19, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 17.3R1 (unaffected)

Affected range stops below 17.3R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4R2-S10, 17.4R3-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1R3-S10, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2R2-S7, 18.2R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2X75-D13, 18.2X75-D411.1, 18.2X75-D420.18, 18.2X75-D52.3, 18.2X75-D60, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.3R2-S4, 18.3R3-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.4R1-S7, 18.4R2-S4, 18.4R3-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.1R1-S5, 19.1R2-S1, 19.1R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.2R1-S5, 19.2R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.3R2-S2, 19.3R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.4R1-S2, 19.4R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

20.1-EVO ≤ v < 20.1R2-EVO19.2-EVO 19.3-EVO 19.4-EVO 20.1-EVO

Affected range stops below 20.1R2-EVO, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA11032

References (1)

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA11032

CVSS

7.5HIGHjuniper

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-703CWE-20

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