[CVE-2022-2795] Processing large delegations may severely degrade resolver performance
CVE-specific actions
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Assign a CVE identifier -
Determine CVSS score -
Determine the range of BIND versions affected (including the Subscription Edition) -
Determine whether workarounds for the problem exists -
Create a draft of the security advisory and put the information above in there -
Prepare a detailed description of the problem which should include the following by default: - instructions for reproducing the problem (a system test is good enough)
- explanation of code flow which triggers the problem (a system test is not good enough)
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Prepare a private merge request containing the following items in separate commits: - a test for the issue (may be moved to a separate merge request for deferred merging)
- a fix for the issue
- documentation updates (<code>CHANGES</code>, release notes, anything else applicable)
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Ensure the merge request from the previous step is reviewed by SWENG staff and has no outstanding discussions -
Ensure the documentation changes introduced by the merge request addressing the problem are reviewed by Support and Marketing staff -
Prepare backports of the merge request addressing the problem for all affected (and still maintained) BIND branches (backporting might affect the issue's scope and/or description) -
Prepare a standalone patch for the last stable release of each affected (and still maintained) BIND branch
Release-specific actions
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Create/update the private issue containing links to fixes & reproducers for all CVEs fixed in a given release cycle -
Reserve a block of CHANGESplaceholders once the complete set of vulnerabilities fixed in a given release cycle is determined -
Ensure the merge requests containing CVE fixes are merged into security-*branches in CVE identifier order
Post-disclosure actions
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Merge a regression test reproducing the bug into all affected (and still maintained) BIND branches
Paper
NXRedirect_-_Attack_Complexity_DDoS_attack_on_DNS_Recursive_Resolvers_WithNames.pdfs