[3.9] bind: Multiple vulnerabilities (CVE-2018-5743, CVE-2019-6467) (#10368) · Issues · alpine / aports

[3.9] bind: Multiple vulnerabilities (CVE-2018-5743, CVE-2019-6467)

CVE-2018-5743: Limiting simultaneous TCP clients is ineffective

By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for
most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contains an error which can be exploited to grow the number of simultaneous connections beyond this limit.

Affected Versions:

BIND 9.9.0 ->9.10.8-P1, 9.11.0 ->9.11.6, 9.12.0 ->9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5.
Versions 9.13.0 ->9.13.7 of the 9.13 development branch are also affected.

Fixed In Version:

bind 9.11.6-P1, bind 9.12.4-P1, bind 9.14.1

References:

https://kb.isc.org/docs/cve-2018-5743
https://www.openwall.com/lists/oss-security/2019/04/25/3

CVE-2019-6467: flaw in nxredirect can cause assertion failure

A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally.
The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring
to provide the root zone, although other configurations are also possible.

Affected Versions:

BIND 9.12.0->9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch.

Fixed In Version:

bind 9.12.4-P1, bind 9.14.1

References:

https://kb.isc.org/docs/cve-2019-6467
https://www.openwall.com/lists/oss-security/2019/04/25/3

(from redmine: issue id 10368, created on 2019-04-29, closed on 2019-05-03)

Relations:
- parent #10366 (closed)
Changesets:
- Revision 06bfe718 by Natanael Copa on 2019-05-02T11:51:29Z:

main/bind: security upgrade to 9.12.4_p1 (CVE-2018-5743,CVE-2019-6467)

This release introduced 3 new tools with python dependency
(dnssec-checkdns, dnssec-coverage and dnssec-keymgr). Move those tools
to a subpackage, bind-dnssec-tools, to avoid unexpectedly pull in python
as dependency for stable upgraders.

There are other tools in bind-tools that belongs to bind-dnssec-tools,
but we dont move those in a stable branch to avoid breaking things for
current users.

fixes #10368

CVE-2018-5743: Limiting simultaneous TCP clients is ineffective
---------------------------------------------------------------

By design, BIND is intended to limit the number of TCP clients that can
be connected at any given time. The number of allowed connections is a
tunable parameter which, if unset, defaults to a conservative value
for  
most servers. Unfortunately, the code which was intended to limit the
number of simultaneous connections contains an error which can be
exploited to grow the number of simultaneous connections beyond this
limit.

### Affected Versions:

BIND 9.9.0 ->9.10.8-P1, 9.11.0 ->9.11.6, 9.12.0 ->9.12.4,
9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -&gt;
9.11.5-S3, and 9.11.5-S5.  
Versions 9.13.0 ->9.13.7 of the 9.13 development branch are also
affected.

### Fixed In Version:

bind 9.11.6-P1, bind 9.12.4-P1, bind 9.14.1

### References:

https://kb.isc.org/docs/cve-2018-5743  
https://www.openwall.com/lists/oss-security/2019/04/25/3

CVE-2019-6467: flaw in nxredirect can cause assertion failure
-------------------------------------------------------------

A programming error in the nxdomain-redirect feature can cause an
assertion failure in query.c if the alternate namespace used by
nxdomain-redirect is a descendant of a zone that is served locally.  
The most likely scenario where this might occur is if the server, in
addition to performing NXDOMAIN redirection for recursive clients, is
also serving a local copy of the root zone or using mirroring  
to provide the root zone, although other configurations are also
possible.

### Affected Versions:

BIND 9.12.0->9.12.4, 9.14.0. Also affects all releases in the 9.13
development branch.

### Fixed In Version:

bind 9.12.4-P1, bind 9.14.1

### References:

https://kb.isc.org/docs/cve-2019-6467  
https://www.openwall.com/lists/oss-security/2019/04/25/3

*(from redmine: issue id 10368, created on 2019-04-29, closed on 2019-05-03)*

* Relations:
  * parent #10366
* Changesets:
  * Revision 06bfe718fd41663cb0f35a441af82a32ca3ec15b by Natanael Copa on 2019-05-02T11:51:29Z:

```
main/bind: security upgrade to 9.12.4_p1 (CVE-2018-5743,CVE-2019-6467)

This release introduced 3 new tools with python dependency
(dnssec-checkdns, dnssec-coverage and dnssec-keymgr). Move those tools
to a subpackage, bind-dnssec-tools, to avoid unexpectedly pull in python
as dependency for stable upgraders.

There are other tools in bind-tools that belongs to bind-dnssec-tools,
but we dont move those in a stable branch to avoid breaking things for
current users.

fixes #10368
```

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