HTTP fails to validate against control chars in header names which may lead to HTTP request smuggling
CVSS score
6.5
EPSS probability
%2.9
Risk score
0.2
Published
4 y ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2021-43797 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty prior to version 4.1.71.Final skips control chars when they are present at the beginning / end of the header name. It should instead fail fast as these are not allowed by the spec and could lead to HTTP request smuggling. Failing to do the validation might cause netty to "sanitize" header names before it forward these to another remote system when used as proxy. This remote system can't see the invalid usage anymore, and therefore does not do the validation itself. Users should upgrade to version 4.1.71.Final.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2021-43797 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | netty | netty | View |
| 2 | netty | netty | View |
| 3 | quarkus | quarkus | View |
| 4 | netapp | oncommand workflow automation | View |
| 5 | netapp | snapcenter | View |
| 6 | oracle | banking deposits and lines of credit servicing | View |
| 7 | oracle | banking party management | View |
| 8 | oracle | banking platform | View |
| 9 | oracle | coherence | View |
| 10 | oracle | coherence | View |
| 11 | oracle | communications cloud native core binding support function | View |
| 12 | oracle | communications cloud native core network slice selection function | View |
| 13 | oracle | communications cloud native core policy | View |
| 14 | oracle | communications cloud native core security edge protection proxy | View |
| 15 | oracle | communications cloud native core unified data repository | View |
| 16 | oracle | communications design studio | View |
| 17 | oracle | communications instant messaging server | View |
| 18 | oracle | helidon | View |
| 19 | oracle | helidon | View |
| 20 | oracle | peoplesoft enterprise peopletools | View |
| 21 | oracle | peoplesoft enterprise peopletools | View |
| 22 | debian | debian linux | View |
| 23 | debian | debian linux | 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 |
|---|---|---|---|---|
| 6.5 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N | NVD |
| 6.5 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N | CVE CNA |
| 4.3 | CVSS V2 | — | AV:N/AC:M/Au:N/C:N/I:P/A:N | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
3 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.
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-2021-43797 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-2021-43797 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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Get this vulnerability through the API
Affected products, version ranges, exploitation status and patch information in a single request, with a free key.
curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2021-43797"