CVE-2022-22166

rpd crash via malformed BGP SR-TE attribute

Published Jan 19, 2022 · Updated Sep 16, 2024

Denial of service in Juniper Networks Junos OS 20.4 and 21.1 allows remote attackers to crash rpd via a malformed BGP update. When update tracing is enabled, rpd fails to validate the quantity encoded in a BGP SR-TE policy tunnel attribute before processing it and cores. An established BGP session and the nondefault update-tracing configuration are required, and the resulting impact is limited to interruption of routing service.

CVSS severity6.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Juniper Networks Junos OS 20.4 and 21.1 allows remote attackers to crash rpd via a malformed BGP update. When update tracing is enabled, rpd fails to validate the quantity encoded in a BGP SR-TE policy tunnel attribute before processing it and cores. An established BGP session and the nondefault update-tracing configuration are required, and the resulting impact is limited to interruption of routing service.

The record

CVE
CVE-2022-22166
Published
Jan 19, 2022
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-1284, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20.4 <20.4R3-S1
  2. Affected versionversion=21.1 <21.1R2-S2, 21.1R3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=20.4 <20.4R3-S1; version=21.1 <21.1R2-S2, 21.1R3

Published CVSS scores

3.3NIST NVDAV:A/AC:L/Au:N/C:N/I:N/A:P
6.5Juniper NetworksCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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