CVE-2022-22235Network attack vector

PFE crash via malformed encapsulated IP header

Published Oct 18, 2022 · Updated May 10, 2025

Improper condition handling in Junos OS on SRX Series allows remote attackers to crash the PFE with malformed GTP traffic. The PFE processes rather than rejects a malformed IP-header field inside GTP-encapsulated GPRS traffic, causing flowd to terminate. Reachability requires endpoint address validation and preexisting state outside the attacker's control, limiting the consequence to a forwarding-engine service interruption.

CVSS severity5.9
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper condition handling in Junos OS on SRX Series allows remote attackers to crash the PFE with malformed GTP traffic. The PFE processes rather than rejects a malformed IP-header field inside GTP-encapsulated GPRS traffic, causing flowd to terminate. Reachability requires endpoint address validation and preexisting state outside the attacker's control, limiting the consequence to a forwarding-engine service interruption.

The record

CVE
CVE-2022-22235
Published
Oct 18, 2022
Updated
May 10, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 10, 2025Record 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=20.2 <20.2R3-S5
  2. Affected versionversion=20.3 <20.3R3-S4
  3. Affected versionversion=20.4 <20.4R3-S3
  4. Affected versionversion=21.1 <21.1R3-S2
  5. Affected versionversion=21.2 <21.2R3-S1
  6. Affected versionversion=21.3 <21.3R3
  7. Affected versionversion=21.4 <21.4R1-S2, 21.4R2
  8. Affected versionversion=22.1 <22.1R1-S1, 22.1R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=20.2 <20.2R3-S5; version=20.3 <20.3R3-S4; version=20.4 <20.4R3-S3; version=21.1 <21.1R3-S2; version=21.2 <21.2R3-S1; version=21.3 <21.3R3; version=21.4 <21.4R1-S2, 21.4R2; version=22.1 <22.1R1-S1, 22.1R2

Published CVSS scores

5.9Juniper NetworksCVSS:3.1/AV:N/AC:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
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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