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The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this...
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | Fixed | Fixed | Fixed | Fixed |
| isc-dhcp | Not affected | Not affected | Not affected | Not affected |
A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a...
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | — | Not affected | Not affected | Not affected |
| isc-dhcp | — | Not affected | Not affected | Not affected |
Some fixes available 8 of 10
If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop...
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 | Not in release |
Some fixes available 12 of 21
Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can...
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 | Not affected |
| bind9-libs | Not in release | Needs evaluation | Needs evaluation | Not in release |
Processing of repeated responses to the same query, where both responses contain ECS pseudo-options, but where the first is broken in some way, can cause BIND to exit with an assertion failure. 'Broken' in this context is anything...
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | — | Not affected | Not affected | Not affected |
| isc-dhcp | — | Not affected | Not affected | Not affected |
This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require...
2 affected packages
isc-dhcp, bind9
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| isc-dhcp | — | Not affected | Not affected | Not affected |
| bind9 | — | Fixed | Not affected | Not affected |
BIND 9 resolver can crash when stale cache and stale answers are enabled, option `stale-answer-client-timeout` is set to a positive integer, and the resolver receives an RRSIG query. This issue affects BIND 9 versions 9.16.12...
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | — | Fixed | Not affected | Not affected |
| isc-dhcp | — | Not affected | Not affected | Not affected |
Sending a flood of dynamic DNS updates may cause `named` to allocate large amounts of memory. This, in turn, may cause `named` to exit due to a lack of free memory. We are not aware of any cases where this has...
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | — | Fixed | Fixed | Not affected |
| isc-dhcp | — | Not affected | Not affected | Not affected |
In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.
1 affected package
isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| isc-dhcp | — | Fixed | Fixed | Fixed |
In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to...
1 affected package
isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| isc-dhcp | — | Fixed | Fixed | Fixed |