HTTP denial of service via oversized 403 responses
Published Apr 27, 2022 · Updated Aug 3, 2024
Resource exhaustion in SonicWall SonicOS CFS Gen 7 allows remote attackers to interrupt HTTP service by requesting prohibited resources. The content-filtering service returns an abnormally large 403 Forbidden response to the request source instead of bounding the response size, consuming resources under repeated requests. No authentication or user interaction is required; exploitation can deny HTTP service, while published impact data reports no confidentiality or integrity effect.
Summary
What happened
Resource exhaustion in SonicWall SonicOS CFS Gen 7 allows remote attackers to interrupt HTTP service by requesting prohibited resources. The content-filtering service returns an abnormally large 403 Forbidden response to the request source instead of bounding the response size, consuming resources under repeated requests. No authentication or user interaction is required; exploitation can deny HTTP service, while published impact data reports no confidentiality or integrity effect.
The record
- CVE
- CVE-2022-22278
- Published
- Apr 27, 2022
- Updated
- Aug 3, 2024
- Vendor
- SonicWall
- Product
- SonicOS
- Classifications
- CWE-770, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 27, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 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.
- Affected versionversion=SonicOS Gen 7 NSa-Series 7.0.1-5030-R2007 and earlier versions.
- Affected versionversion=SonicOS Gen 7 NSsp-Series 7.0.1-5030-R780 and earlier versions.
- Affected versionversion=SonicOS Gen 7 NSv-Series 7.0.1.0-5030-1391 and earlier versions.
- Affected versionversion=SonicOS Gen 7 TZ-Series 7.0.1-5030-R2007 and earlier versions.
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
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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