CVE-2019-6477
Published: 20 November 2019
With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).
Priority
Medium
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
bind9 Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(1:9.11.5.P4+dfsg-5.1ubuntu4)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(1:9.11.3+dfsg-1ubuntu1.11)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Not vulnerable
(code not present)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
(code not present)
|
Notes
| Author | Note |
|---|---|
| mdeslaur | introduced in https://github.com/isc-projects/bind9/commit/761d135ed686601f36fe3d0d4aaa6bf41287bb0f |