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CVE Record

CVE-2022-22206: Junos OS: SRX series: The PFE will crash when specific traffic is scanned by Enhanced Web Filtering safe-search

A Buffer Overflow vulnerability in the PFE of Juniper Networks Junos OS on SRX series allows an unauthenticated network based attacker to cause a Denial of Service (DoS). The PFE will crash when specific traffic is scanned by Enhanced Web Filtering safe-search feature of UTM (Unified Threat management). Continued receipt of this specific traffic will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 20.2 versions prior to 20.2R3-S4 on SRX Series; 20.3 versions prior to 20.3R3-S3 on SRX Series; 20.4 versions prior to 20.4R3-S3 on SRX Series; 21.1 versions prior to 21.1R3-S1 on SRX Series; 21.2 versions prior to 21.2R2-S2, 21.2R3 on SRX Series; 21.3 versions prior to 21.3R2 on SRX Series; 21.4 versions prior to 21.4R2 on SRX Series. This issue does not affect Juniper Networks Junos OS versions prior to 20.2R1.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This flaw can crash the forwarding engine on Juniper SRX firewalls when specific traffic is inspected by UTM Enhanced Web Filtering safe-search. An unauthenticated network attacker could cause service disruption, and repeated traffic could keep the device in a denial-of-service condition.

Executive priority

High priority for organizations relying on SRX firewalls for network availability. The issue affects availability, not confidentiality or integrity, but firewall crashes can disrupt business services and security enforcement.

Technical view

CVE-2022-22206 is a CWE-120 buffer overflow in Junos OS PFE on SRX Series. Affected branches are 20.2 through 21.4 before specified fixed releases. Attack prerequisites are network access, no credentials, no user interaction, and vulnerable safe-search scanning exposure.

Likely exposure

Exposure is most likely on Juniper SRX Series firewalls running affected Junos OS releases with UTM Enhanced Web Filtering safe-search enabled. Junos versions before 20.2R1 are stated as not affected.

Exploitation context

The source bundle does not report active exploitation, and KEV is false. The vendor description supports remote unauthenticated denial of service, with sustained impact if the triggering traffic continues.

Researcher notes

The evidence supports availability-only impact with CVSS 7.5. The vulnerable path involves PFE handling of traffic scanned by UTM Enhanced Web Filtering safe-search. No exploit mechanics or public exploitation evidence are provided in the bundle.

Mitigation direction

  • Upgrade SRX devices to the fixed Junos OS release for each affected branch.
  • Prioritize internet-facing or high-traffic SRX firewalls using UTM safe-search inspection.
  • If upgrade is delayed, check Juniper JSA69710 for supported mitigations or workarounds.
  • Monitor affected devices for recurring PFE crashes until remediation is complete.

Validation and detection

  • Inventory SRX Series devices and record Junos OS branch and exact release.
  • Confirm whether UTM Enhanced Web Filtering safe-search is enabled on each device.
  • Compare installed releases against the fixed-version thresholds in the advisory.
  • Review device telemetry and logs for PFE crashes or repeated forwarding disruptions.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-120: Exact CWE lookup

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cve · low confidence lookup

CVE-2022-22206 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2022-22206Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Juniper NetworksJunos OS20.2, 20.3, 20.4, 21.1, 21.2, 21.3, 21.4Listed
Juniper NetworksJunos OSunspecifiedListed
Weakness

CWE details

CWE-120

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.