CVE-2021-3618
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I. Basic Information for CVE-2021-3618
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
F5 Nginx 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 Nginx是美国F5公司的一款轻量级Web服务器/反向代理服务器及电子邮件（IMAP/POP3）代理服务器，在BSD-like协议下发行。 F5 Nginx存在信任管理问题漏洞，该漏洞源于存在 ALPACA（应用层协议内容混淆）攻击，这会破坏TLS的身份验证，并且可能会发生跨协议攻击。
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 |
|---|---|---|---|---|
| - | ALPACA | vsftpd 3.0.4, nginx 1.21.0, sendmail 8.17 | - |
II. Public POCs for CVE-2021-3618
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · n/a · 2022-03-23 · 65 CVEs total
| CVE-2022-27192 | Aseco Lietuva document management system DVS Avilys 日志信息泄露漏洞 | |
| CVE-2022-27077 | Tenda M3 命令注入漏洞 | |
| CVE-2022-27080 | Tenda M3 命令注入漏洞 | |
| CVE-2022-27079 | Tenda M3 命令注入漏洞 | |
| CVE-2022-27078 | Tenda M3 命令注入漏洞 | |
| CVE-2020-20096 | Meta Facebook Messenger 安全漏洞 | |
| CVE-2020-20095 | Apple iMessage iOS 安全漏洞 | |
| CVE-2020-20094 | Meta Facebook Messenger 安全漏洞 | |
| CVE-2020-20093 | Meta Facebook Messenger 安全漏洞 | |
| CVE-2022-25041 | OpenEMR 安全漏洞 | |
| CVE-2022-25267 | Passwork On-Premise Edition 路径遍历漏洞 | |
| CVE-2022-24934 | Kingsoft WPS 代码注入漏洞 | |
| CVE-2022-22819 | Nxp Semiconductors Nxp Lpc55S69 安全漏洞 | |
| CVE-2022-27254 | Honda Civic 安全漏洞 | |
| CVE-2022-23881 | ZZZCMS zzzphp 安全漏洞 | |
| CVE-2022-23880 | Taocms 代码问题漏洞 | |
| CVE-2022-22952 | VMware Carbon Black App Control 代码问题漏洞 | |
| CVE-2022-22951 | VMware Carbon Black App Control 操作系统命令注入漏洞 | |
| CVE-2021-4150 | Linux kernel 资源管理错误漏洞 | |
| CVE-2021-4149 | Linux kernel 竞争条件问题漏洞 |
Showing top 20 of 65 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: n/a
- CVE-2026-8276
bettercap MySQL Server mysql_server.go integer coercion - CVE-2026-8275
bettercap zerogod IPP Service zerogod_ipp_primitives.go ippR - CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-295
V. Comments for CVE-2021-3618
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