Reject more queries with invalid header values
This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.
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pdns-recursor vulnerabilities
Vulnerabilities published for pdns-recursor in the last 30 days: 0. Listed in the KEV catalogue: 0.
Vulnerabilities: 27
Spoofed answers can mark an authoritative non-EDNS capable
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.
Published UpdatedZONEMD validation can be bypassed
An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.
Published UpdatedMissing input validation for catalog zones
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
Published UpdatedInsufficient input validation in ZoneToCache
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.
Published UpdatedInformation about ECS zero scoped answers might leak to clients that use a specific ECS
ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;
Published UpdatedZoneToCache can poison the cache
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.
Published UpdatedInsufficient input validation of internal web server
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
Published UpdatedInsufficient validation of cookie reply
An attacker can send replies that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service. Cookies are disabled by default.
Published UpdatedNull pointer accces in aggressive NSEC(3) cache
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
Published UpdatedInsufficient input validation of internal webserver
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
Published UpdatedConcurrent modification of RPZ data can lead to denial of servce
Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.
Published UpdatedCrafted zones can cause increased resource usage
By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.
Published UpdatedInsufficient input validation of internal webserver
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
Published UpdatedUnbounded memory allocation by internal web server
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
Published UpdatedInsufficient validation of zonemd record
If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
Published UpdatedNull pointer dereference in RPZ transfer
An RPZ sent by a malicious authoritative server can result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
Published UpdatedCrafted delegations or IP fragments can poison cached delegations in Recursor
Crafted delegations or IP fragments can poison cached delegations in Recursor.
Published UpdatedCrafted delegations or IP fragments can poison cached delegations in Recursor
Crafted delegations or IP fragments can poison cached delegations in Recursor.
Published UpdatedCrafted zones can lead to increased incoming network traffic
Crafted zones can lead to increased incoming network traffic.
Published Updated
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