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Some fixes available 11 of 20
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 | Needs evaluation |
| bind9-libs | Not in release | Needs evaluation | Needs evaluation | Not in release |
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 |
By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | — | Fixed | Fixed | Fixed |
| isc-dhcp | — | Not affected | Not affected | Not affected |
By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.
2 affected packages
bind9, isc-dhcp
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| bind9 | — | Not affected | Fixed | Fixed |
| isc-dhcp | — | Not affected | 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 |
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 |
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 been exploited....
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 |
By sending specific queries to the resolver, an attacker can cause named to crash.
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 |
An attacker can leverage this flaw to gradually erode available memory to the point where named crashes for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the potential to deny service.
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 |
The underlying bug might cause read past end of the buffer and either read memory it should not read, or crash the process.
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 |