CVE-2021-37147— Request Smuggling - LF line ending
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I. Basic Information for CVE-2021-37147
Vulnerability Information
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Vulnerability Title
Request Smuggling - LF line ending
Source: NVD (National Vulnerability Database)
Vulnerability Description
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Traffic Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Traffic Server（ATS）是美国阿帕奇（Apache）基金会的一套可扩展的HTTP代理和缓存服务器。 Apache Traffic 存在安全漏洞，该漏洞源于程序没有对标头进行正确解析。以下产品及版本受到影响：Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Traffic Server | 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0 | - |
II. Public POCs for CVE-2021-37147
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-37147
Same Patch Batch · Apache Software Foundation · 2021-11-03 · 6 CVEs total
| CVE-2021-37148 | Request Smuggling - transfer encoding validation | |
| CVE-2021-37149 | Request Smuggling - multiple attacks | |
| CVE-2021-38161 | Not validating origin TLS certificate | |
| CVE-2021-41585 | ATS stops accepting connections on FreeBSD | |
| CVE-2021-43082 | heap-buffer-overflow with stats-over-http plugin |
IV. Related Vulnerabilities
Same product: Apache Traffic Server
- CVE-2025-65114
Apache Traffic Server: Malformed chunked message body allows - CVE-2025-58136
Apache Traffic Server: A simple legitimate POST request caus - CVE-2025-31698
Apache Traffic Server: Client IP address from PROXY protocol - CVE-2025-49763
Apache Traffic Server: Remote DoS via memory exhaustion in E - CVE-2024-53868
Apache Traffic Server: Malformed chunked message body allows
Same vendor: Apache Software Foundation
- CVE-2026-39816
Apache NiFi: Missing Execute Code Required Permission on Tin - CVE-2026-25199
Apache CloudStack: Proxmox Extension Allows Unauthorized Cro - CVE-2026-25077
Apache CloudStack: Unauthenticated Command Injection in Dire - CVE-2025-69233
Apache CloudStack: Domain/account resources limits not honor - CVE-2025-66467
Apache CloudStack: MinIO policy remains intact on bucket del
Same weakness: CWE-20
V. Comments for CVE-2021-37147
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