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[A crafted DNS packet can cause increased memory and CPU consumption]
3 affected packages
dnsdist, pdns, pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| dnsdist | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
| pdns | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without signature validation when the wildcard answer is a CNAME or DNAME record.
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
If the auth responds very slowly and the records expire in between, the capping of TTLs is not enforced for lack of data. This does not happen on regular resolve as then then the child records are used immediately if not expired...
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |
ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;
1 affected package
pdns-recursor
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| pdns-recursor | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation | Needs evaluation |