Ubuntu update for Bind

1) NULL pointer dereference

EUVDB-ID: #VU5674

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-3135

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference error when parsing DNS queries, if ISC BIND is configured with Response Policy Zones (RPZ) and DNS64 to rewrite query responses. A remote unauthenticated attacker can send specially crafted DNS queries, trigger NULL pointer dereference and cause denial of service.

Successful exploitation of the vulnerability will result in DoS attack against affected daemon.

Mitigation

Update the affected packages

Ubuntu 16.10:

bind9 1:9.10.3.dfsg.P4-10.1ubuntu1.3

Ubuntu 16.04 LTS:

bind9 1:9.10.3.dfsg.P4-8ubuntu1.5

Ubuntu 14.04 LTS:

bind9 1:9.9.5.dfsg-3ubuntu0.13

Ubuntu 12.04 LTS:

bind9 1:9.8.1.dfsg.P1-4ubuntu0.21

Vulnerable software versions

Ubuntu: 12.04 - 16.10

CPE2.3

• cpe:2.3:o:canonical:ubuntu:12.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:16.10:*:*:*:*:*:*:*

External links

https://www.ubuntu.com/usn/usn-3201-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.