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If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance. This issue affects BIND 9 versions...
2 affected packages
bind9, isc-dhcp
| Package | 26.04 LTS | 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 |
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 | 26.04 LTS | 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 | Not affected |
| bind9-libs | — | Not in release | Not affected | Not affected | Not in release |
A bad interaction between DNS64 and serve-stale may cause `named` to crash with an assertion failure during recursive resolution, when both of these features are enabled. This issue affects BIND 9 versions 9.16.12 through 9.16.45,...
3 affected packages
bind9, isc-dhcp, bind9-libs
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| bind9 | — | Fixed | Fixed | Not affected | Not affected |
| isc-dhcp | — | Not affected | Not affected | Not affected | Not affected |
| bind9-libs | — | Not in release | Not affected | Not affected | Not in release |
A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when: - `nxdomain-redirect <domain>;` is configured, and - the resolver receives a PTR query for an RFC 1918 address that...
3 affected packages
bind9, isc-dhcp, bind9-libs
| Package | 26.04 LTS | 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 29 of 48
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random...
7 affected packages
bind9, isc-dhcp, pdns-recursor, dnsmasq, unbound...
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| bind9 | Fixed | Fixed | Fixed | Fixed | Fixed |
| isc-dhcp | Needs evaluation | Needs evaluation | Not affected | Not affected | Not affected |
| pdns-recursor | Not affected | Not affected | Needs evaluation | Needs evaluation | Needs evaluation |
| dnsmasq | Fixed | Fixed | Fixed | Fixed | Fixed |
| unbound | Fixed | Fixed | Fixed | Fixed | Needs evaluation |
| knot-resolver | Not affected | Not affected | Needs evaluation | Needs evaluation | Needs evaluation |
| bind9-libs | Not in release | Not in release | Needs evaluation | Needs evaluation | Not in release |
Some fixes available 29 of 48
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of...
7 affected packages
bind9, isc-dhcp, pdns-recursor, dnsmasq, unbound...
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| bind9 | Fixed | Fixed | Fixed | Fixed | Fixed |
| isc-dhcp | Needs evaluation | Needs evaluation | Not affected | Not affected | Not affected |
| pdns-recursor | Not affected | Not affected | Needs evaluation | Needs evaluation | Needs evaluation |
| dnsmasq | Fixed | Fixed | Fixed | Fixed | Fixed |
| unbound | Fixed | Fixed | Fixed | Fixed | Needs evaluation |
| knot-resolver | Not affected | Not affected | Needs evaluation | Needs evaluation | Needs evaluation |
| bind9-libs | Not in release | Not in release | Needs evaluation | Needs evaluation | Not in release |
Some fixes available 8 of 16
The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the...
3 affected packages
bind9, isc-dhcp, bind9-libs
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| bind9 | Fixed | Fixed | Fixed | Fixed | Ignored |
| isc-dhcp | Needs evaluation | Needs evaluation | Not affected | Not affected | Not affected |
| bind9-libs | Not in release | Not in release | Needs evaluation | Needs evaluation | Not in release |
A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS...
2 affected packages
bind9, isc-dhcp
| Package | 26.04 LTS | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|---|
| bind9 | — | Fixed | Fixed | Not affected | Not affected |
| isc-dhcp | — | Not affected | Not affected | Not affected | Not affected |
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 | 26.04 LTS | 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 | 26.04 LTS | 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 |