Bug 2264285 (CVE-2023-5680)

Summary: CVE-2023-5680 bind9: Cleaning an ECS-enabled cache may cause excessive CPU load
Product: [Other] Security Response Reporter: Marco Benatto <mbenatto>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: bind 9.16.48-S1, bind 9.18.24-S1 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the bind9 package. This issue may allow an attacker to substantially decrease `named` performance by sending a specific set of queries, forcing the same name to have a large number of ECS records stored. In the worst case scenario, `named` can become unresponsive, leading to a Denial of Service.
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Clone Of: Environment:
Last Closed: 2024-02-15 17:45:32 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: 2264286, 2264287, 2264288, 2264289    
Bug Blocks: 2263895    

Description Marco Benatto 2024-02-14 22:12:40 UTC 
If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance.
Comment 1 Marco Benatto 2024-02-14 22:13:13 UTC 
Created bind tracking bugs for this issue:

Affects: fedora-all [bug 2264286]


Created dhcp tracking bugs for this issue:

Affects: fedora-all [bug 2264289]


Created dnsmasq tracking bugs for this issue:

Affects: fedora-all [bug 2264288]


Created unbound tracking bugs for this issue:

Affects: fedora-all [bug 2264287]