DNS: Multiple Vendors DNS DNSSEC Response Handling Denial Of Service
This signature detects attempts to exploit a known vulnerability against DNS DNSSEC. A successful attack can result in a denial-of-service condition.
Extended Description
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.
Affected Products
Microsoft windows_server_2022
References
CVE: CVE-2023-50387
Short Name
DNS:DNSSEC-RESHAN-DOS
Severity
Warning
Recommended
True
Recommended Action
Drop
Category
DNS
Keywords
CVE-2023-50387 DNS DNSSEC Denial Handling Multiple Of Response Service Vendors
Release Date
05/31/2024
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3710
False Positive
Unknown
Vendors
Powerdns
Redhat
Nic
Fedoraproject
Thekelleys
Nlnetlabs
Isc
Microsoft