Incorrect Transfer-Encoding handling with HTTP/1.0
CVSS score
5.3
EPSS probability
%74.7
Risk score
4.0
Published
5 y ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2021-33037 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2021-33037 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Apache Software Foundation | Apache Tomcat | View |
| 2 | apache | tomcat | View |
| 3 | apache | tomcat | View |
| 4 | apache | tomcat | View |
| 5 | apache | tomee | View |
| 6 | debian | debian linux | View |
| 7 | debian | debian linux | View |
| 8 | oracle | agile product lifecycle management | View |
| 9 | oracle | communications cloud native core policy | View |
| 10 | oracle | communications cloud native core service communication proxy | View |
| 11 | oracle | communications diameter signaling router | View |
| 12 | oracle | communications instant messaging server | View |
| 13 | oracle | communications policy management | View |
| 14 | oracle | communications pricing design center | View |
| 15 | oracle | communications session report manager | View |
| 16 | oracle | communications session route manager | View |
| 17 | oracle | graph server and client | View |
| 18 | oracle | healthcare translational research | View |
| 19 | oracle | hospitality cruise shipboard property management system | View |
| 20 | oracle | instantis enterprisetrack | View |
| 21 | oracle | instantis enterprisetrack | View |
| 22 | oracle | instantis enterprisetrack | View |
| 23 | oracle | managed file transfer | View |
| 24 | oracle | managed file transfer | View |
| 25 | oracle | mysql enterprise monitor | View |
| 26 | oracle | sd-wan edge | View |
| 27 | oracle | sd-wan edge | View |
| 28 | oracle | secure global desktop | View |
| 29 | oracle | utilities testing accelerator | View |
| 30 | oracle | utilities testing accelerator | View |
| 31 | oracle | utilities testing accelerator | View |
| 32 | mcafee | epolicy orchestrator | View |
| 33 | mcafee | epolicy orchestrator | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 5.3 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD |
| 5.0 | CVSS V2 | — | AV:N/AC:L/Au:N/C:N/I:P/A:N | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-33037 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-33037 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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