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Suggestion detail

Untriaged
Permalink CVE-2026-19538
8.2 HIGH
  • CVSS version (CVSS): 4.0
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Attack Requirement (AT): Present (P)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Vulnerable System Impact Confidentiality (VC): High (H)
  • Vulnerable System Impact Integrity (VI): None (N)
  • Vulnerable System Impact Availability (VA): None (N)
  • Subsequent System Impact Confidentiality (SC): None (N)
  • Subsequent System Impact Integrity (SI): None (N)
  • Subsequent System Impact Availability (SA): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Attack Requirement (MAT): Present (P)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Vulnerable System Impact Confidentiality (MVC): High (H)
  • Modified Vulnerable System Impact Integrity (MVI): None (N)
  • Modified Vulnerable System Impact Availability (MVA): None (N)
  • Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
  • Modified Subsequent System Impact Integrity (MSI): Negligible (N)
  • Modified Subsequent System Impact Availability (MSA): Negligible (N)
  • Safety (S): Not Defined (X)
  • Automatable (AU): Not Defined (X)
  • Recovery (R): Not Defined (X)
  • Value Density (V): Not Defined (X)
  • Vulnerability Response Effort (RE): Not Defined (X)
  • Provider Urgency (U): Not Defined (X)
  • Confidentiality Req. (CR): Not Defined (X)
  • Integrity Req. (IR): Not Defined (X)
  • Availability Req. (AR): Not Defined (X)
  • Exploit Maturity (E): Not Defined (X)
created 3 days, 13 hours ago Activity log
  • Created suggestion 3 days, 13 hours ago
Bypass of BLOCKED ACL items on proxy protocol port over TCP or TLS

The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.

Affected products

NSD
  • <4.15.1

Matching in nixpkgs

pkgs.nsd

Authoritative only, high performance, simple and open source name server

pkgs.dnsdbq

C99 program that accesses passive DNS database systems

pkgs.nsdiff

Create a "nsupdate" script from DNS zone file differences

  • nixos-unstable 1.85
    • nixpkgs-unstable 1.85
    • nixos-unstable-small 1.85
  • nixos-26.05 1.85
    • nixos-26.05-small 1.85
    • nixpkgs-26.05-darwin 1.85

pkgs.dnsdiag

DNS Measurement, Troubleshooting and Security Auditing Toolset

pkgs.adidnsdump

Active Directory Integrated DNS dumping by any authenticated user

pkgs.perlPackages.nsdiff

Create a "nsupdate" script from DNS zone file differences

  • nixos-unstable 1.85
    • nixpkgs-unstable 1.85
    • nixos-unstable-small 1.85
  • nixos-26.05 1.85
    • nixos-26.05-small 1.85
    • nixpkgs-26.05-darwin 1.85

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