Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : bind9 regression (USN-3346-2)

Ubuntu Security Notice (C) 2017 Canonical, Inc. / NASL script (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing a security-related patch.

Description :

USN-3346-1 fixed vulnerabilities in Bind. The fix for CVE-2017-3142
introduced a regression in the ability to receive an AXFR or IXFR in
the case where TSIG is used and not every message is signed. This
update fixes the problem.

In addition, this update adds the new root zone key signing key (KSK).

Clement Berthaux discovered that Bind did not correctly check TSIG
authentication for zone update requests. An attacker could use this to
improperly perform zone updates. (CVE-2017-3143)

Clement Berthaux discovered that Bind did not correctly
check TSIG authentication for zone transfer requests. An
attacker could use this to improperly transfer entire zones.
(CVE-2017-3142).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected bind9 package.

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N)
CVSS Temporal Score : 5.3
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 103319 ()

Bugtraq ID:

CVE ID: CVE-2017-3142
CVE-2017-3143

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