CVE-2022-22208

Junos OS and Junos OS Evolved: An rpd crash can occur due to memory corruption caused by flapping BGP sessions

MEDIUM

5.9

CVSS Score

Published: October 18, 2022 at 02:46 AM UTC

Updated: June 17, 2026 at 04:28 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

MEDIUM5.9

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

A Use After Free vulnerability in the Routing Protocol Daemon (rdp) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause Denial of Service (DoS). When a BGP session flap happens, a Use After Free of a memory location that was assigned to another object can occur, which will lead to an rpd crash. This is a race condition that is outside of the attacker's control and cannot be deterministically exploited. Continued flapping of BGP sessions can create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: All versions prior to 18.4R2-S9, 18.4R3-S11; 19.1 versions prior to 19.1R3-S8; 19.2 version 19.2R1 and later versions; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S6; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R3-S3; 21.2 versions prior to 21.2R2-S1, 21.2R3. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S4-EVO; 21.1-EVO versions prior to 21.1R3-S2-EVO; 21.2-EVO versions prior to 21.2R3-EVO; 21.3-EVO versions prior to 21.3R2-EVO.

Affected

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

Junos OS Evolved · Juniper

95%

21.1 21.1 r1 21.1 r1-s1 21.1 r2 21.1 r3 21.1 r3-s1 21.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r2-s1 21.2 r2-s2 21.3 21.3 r1 21.3 r1-s1

Junos · Juniper Networks

95%

v < 18.4v < 18.4R2-S9, 18.4R3-S1119.1 ≤ v < 19.1R3-S819.2R1 ≤ v < 19.2*19.3 ≤ v < 19.3R3-S519.4 ≤ v < 19.4R2-S6, 19.4R3-S620.1R1 ≤ v < 20.1*20.2 ≤ v < 20.2R3-S320.3 ≤ v < 20.3R3-S220.4 ≤ v < 20.4R3-S121.1 ≤ v < 21.1R3-S321.2 ≤ v < 21.2R2-S1, 21.2R318.4 18.4 r1 18.4 r1-s1 18.4 r1-s2 18.4 r1-s3 18.4 r1-s4 18.4 r1-s5 18.4 r1-s6 18.4 r1-s7 18.4 r2 18.4 r2-s1 18.4 r2-s10 18.4 r2-s2 18.4 r2-s3 18.4 r2-s4 18.4 r2-s5 18.4 r2-s6 18.4 r2-s7 18.4 r2-s8 18.4 r3-s11 19.1 19.1 r1 19.1 r1-s1 19.1 r1-s2 19.1 r1-s3 19.1 r1-s4 19.1 r1-s5 19.1 r1-s6 19.1 r2 19.1 r2-s1 19.1 r2-s2 19.1 r2-s3 19.1 r3 19.1 r3-s1 19.1 r3-s2 19.1 r3-s3 19.1 r3-s4 19.1 r3-s5 19.1 r3-s6 19.1 r3-s7 19.2 19.2 r1 19.2R1 19.3 19.3 r1 19.3 r1-s1 19.3 r2 19.3 r2-s1 19.3 r2-s2 19.3 r2-s3 19.3 r2-s4 19.3 r2-s5 19.3 r2-s6 19.3 r3 19.3 r3-s1 19.3 r3-s2 19.3 r3-s3 19.3 r3-s4 19.4 19.4 r1 19.4 r1-s1 19.4 r1-s2 19.4 r1-s3 19.4 r1-s4 19.4 r2 19.4 r2-s1 19.4 r2-s2 19.4 r2-s3 19.4 r2-s4 19.4 r2-s5 19.4 r3-s6 20.1 20.1 r1 20.1R1 20.2 20.2 r1 20.2 r1-s1 20.2 r1-s2 20.2 r1-s3 20.2 r2 20.2 r2-s1 20.2 r2-s2 20.2 r2-s3 20.2 r3 20.2 r3-s1 20.2 r3-s2 20.3 20.3 r1 20.3 r1-s1 20.3 r1-s2 20.3 r2 20.3 r2-s1 20.3 r3 20.3 r3-s1 20.4 20.4 r1 20.4 r1-s1 20.4 r2 20.4 r2-s1 20.4 r2-s2 20.4 r3 21.1 21.1 r1 21.1 r1-s1 21.1 r2 21.1 r2-s1 21.1 r2-s2 21.1 r3 21.1 r3-s1 21.1 r3-s2 21.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r3

Affected range stops below 18.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.4R2-S9, 18.4R3-S11, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.1R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.2*, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.3R3-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.4R2-S6, 19.4R3-S6, so it looks safe — our inference, not a vendor statement

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

Affected range stops below 20.2R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.3R3-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.4R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.1R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.2R2-S1, 21.2R3, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

v < 20.4R3-S4-EVO21.1-EVO ≤ v < 21.1R3-S2-EVO21.2-EVO ≤ v < 21.2R3-EVO21.3-EVO ≤ v < 21.3R2-EVO21.1-EVO 21.2-EVO 21.3-EVO

Affected range stops below 20.4R3-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.1R3-S2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.2R3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.3R2-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/JSA69879

References (1)

Vendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA69879

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMjuniper

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

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-416CWE-362

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