Bug 2342890

Summary: CVE-2024-11187 dhcp: Many records in the additional section cause CPU exhaustion [fedora-40]
Product: [Fedora] Fedora Reporter: Marco Benatto <mbenatto>
Component: dhcpAssignee: Martin Osvald 🛹 <mosvald>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: 40CC: jorton, mosvald, pavel, pemensik
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["7fd79fa0-23b5-4108-b3f8-e3e937314db3"]}
Fixed In Version: Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2025-02-05 06:20:33 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2342879    

Description Marco Benatto 2025-01-29 22:00:56 UTC 
More information about this security flaw is available in the following bug:

https://bugzilla.redhat.com/show_bug.cgi?id=2342879

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Comment 1 Martin Osvald 🛹 2025-02-05 06:20:33 UTC 
This affects only dns server because the flaw happens when bind asks for answers from other dns servers/resolvers that contain more entries in rdata section which is apparently causing extra iterations/cpu consumption at the bind side, not in dhcp server updating clients' ip with bind or looking up the current records for clients.