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If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Not affected | Not affected | Not affected | Not affected |
isc-dhcp | Not affected | Not affected | Not affected | Not affected |
bind9-libs | Not in release | Not affected | Not affected | — |
A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1,...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Not affected | Not affected | Not affected | Not affected |
isc-dhcp | Not affected | Not affected | Not affected | Not affected |
bind9-libs | Not in release | Not affected | Not affected | — |
When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Not affected | Not affected | Not affected | Not affected |
isc-dhcp | Not affected | Not affected | Not affected | Not affected |
bind9-libs | Not in release | Not affected | Not affected | — |
Some fixes available 5 of 6
Client queries that trigger serving stale data and that also require lookups in local authoritative zone data may result in an assertion failure. This issue affects BIND 9 versions 9.16.13 through 9.16.50, 9.18.0 through 9.18.27,...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Fixed | Fixed | Fixed | Not affected |
isc-dhcp | Not affected | Not affected | Not affected | Not affected |
bind9-libs | Not in release | Not affected | Not affected | — |
Some fixes available 7 of 14
If a server hosts a zone containing a “KEY” Resource Record, or a resolver DNSSEC-validates a “KEY” Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0)...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Fixed | Fixed | Fixed | Fixed |
isc-dhcp | Needs evaluation | Not affected | Not affected | Needs evaluation |
bind9-libs | Not in release | Needs evaluation | Needs evaluation | — |
Some fixes available 7 of 14
Resolver caches and authoritative zone databases that hold significant numbers of RRs for the same hostname (of any RTYPE) can suffer from degraded performance as content is being added or updated, and also when handling client...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Fixed | Fixed | Fixed | Fixed |
isc-dhcp | Needs evaluation | Not affected | Not affected | Needs evaluation |
bind9-libs | Not in release | Needs evaluation | Needs evaluation | — |
Some fixes available 5 of 14
Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver’s CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic. This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4,...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Fixed | Fixed | Fixed | Needs evaluation |
isc-dhcp | Needs evaluation | Not affected | Not affected | Needs evaluation |
bind9-libs | Not in release | Needs evaluation | Needs evaluation | — |
Some fixes available 5 of 14
It is possible to construct a zone such that some queries to it will generate responses containing numerous records in the Additional section. An attacker sending many such queries can cause either the authoritative server itself...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Fixed | Fixed | Fixed | Needs evaluation |
isc-dhcp | Needs evaluation | Not affected | Not affected | Needs evaluation |
bind9-libs | Not in release | Needs evaluation | Needs evaluation | — |
Some fixes available 5 of 11
A malicious client can send many DNS messages over TCP, potentially causing the server to become unstable while the attack is in progress. The server may recover after the attack ceases. Use of ACLs will not mitigate...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Fixed | Fixed | Fixed | Not affected |
isc-dhcp | Needs evaluation | Not affected | Not affected | Needs evaluation |
bind9-libs | Not in release | Needs evaluation | Needs evaluation | — |
Some fixes available 1 of 2
To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the...
3 affected packages
bind9, isc-dhcp, bind9-libs
Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
---|---|---|---|---|
bind9 | Not affected | Not affected | Fixed | Not affected |
isc-dhcp | Not affected | Not affected | Not affected | Needs evaluation |
bind9-libs | Not in release | Not affected | Not affected | Not in release |