Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : unbound vulnerability (USN-3673-1)

Medium Nessus Plugin ID 110413

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VPR Score: 1.4

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Ralph Dolmans and Karst Koymans discovered that Unbound did not properly handle certain NSEC records. An attacker could use this to to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick Unbound into accepting a NODATA proof.

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 libunbound2 and / or unbound packages.

See Also

https://usn.ubuntu.com/3673-1/

Plugin Details

Severity: Medium

ID: 110413

File Name: ubuntu_USN-3673-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2018/06/08

Updated: 2019/09/18

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 1.4

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS v3.0

Base Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libunbound2, p-cpe:/a:canonical:ubuntu_linux:unbound, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:17.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 2018/06/07

Vulnerability Publication Date: 2018/01/23

Reference Information

CVE: CVE-2017-15105

USN: 3673-1