fwknop

fwknop - 단일 패킷 인증 SPA 소개 fwknop은 강력한 서비스 은닉을 위해 SPASingle Packet Authorization로 알려진 인증 방식을 구현합니다. SPA는 방화벽 뒤에서 기본적으로 패킷을 차단default-drop하는 상태에서 서비스에 대한 원하는 접근을 통신하기 위해 암호화되고 재전송이 불가능하며 HMAC을 통해 인증되는 단일 패킷만을 필요로 합니다. SPA의 주요 용도는 방화벽을 사용하여 SSH와 같은 서비스에 대한 모든 연결 시도를 차단함으로써 취약점0-day 및 패치되지 않은 코드 모두의 악...

EUVD-2026-15413

A use-after-return vulnerability exists in the named server when handling DNS queries signed with SIG0. Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly mismatch an IP address. In a default-allow ACL denying only specific IP addresses, this may lead to...

VulnCheck KEV: CVE-2021-42013

Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default require all denied or if CGI scripts are enabled. This CVE ID resolves an incomplete patch for...

CVE-2021-36213

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1...

UBUNTU-CVE-2021-36213

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1...

CVE-2021-36213

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1...

CVE-2021-36213

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1...

CVE-2021-36213

HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1...

CVE-2021-36213

HashiCorp Consul and Consul Enterprise versions 1.9.0–1.10.0 are affected by CVE-2021-36213, where a single L7 application-aware deny action under a default-deny policy can cancel the intention and incorrectly allow L4 traffic. The issue is fixed in Consul/Consul Enterprise 1.9.8 and 1.10.1 (upst...

Consul’s Application-Aware Intentions Deny Action Fails Open When Combined With Default Deny Policy

Summary A vulnerability was identified in Consul and Consul Enterprise “Consul” such that using defaultpolicy = "deny" with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. This vulnerability, CVE-2021-36213,...