Ubuntu alert USN-4938-1 (unbound)

From:
             
 
Marc Deslauriers <marc.deslauriers@canonical.com>
To:
             
 
"ubuntu-security-announce@lists.ubuntu.com" <ubuntu-security-announce@lists.ubuntu.com>
Subject:
             
 
[USN-4938-1] Unbound vulnerabilities
Date:
             
 
Thu, 06 May 2021 09:30:00 -0400
Message-ID:
             
 
<c90d5858-8dae-149f-7f3f-103954c9cdd7@canonical.com>
==========================================================================
Ubuntu Security Notice USN-4938-1
May 06, 2021

unbound vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Unbound.

Software Description:
- unbound: validating, recursive, caching DNS resolver

Details:

It was discovered that Unbound contained multiple security issues. A
remote attacker could possibly use these issues to cause a denial of
service, inject arbitrary commands, execute arbitrary code, and overwrite
local files.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  libunbound8                     1.9.4-2ubuntu1.2
  unbound                         1.9.4-2ubuntu1.2

Ubuntu 18.04 LTS:
  libunbound2                     1.6.7-1ubuntu2.4
  unbound                         1.6.7-1ubuntu2.4

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4938-1
  CVE-2019-25031, CVE-2019-25032, CVE-2019-25033, CVE-2019-25034,
  CVE-2019-25035, CVE-2019-25036, CVE-2019-25037, CVE-2019-25038,
  CVE-2019-25039, CVE-2019-25040, CVE-2019-25041, CVE-2019-25042,
  CVE-2020-28935

Package Information:
  https://launchpad.net/ubuntu/+source/unbound/1.9.4-2ubunt...
  https://launchpad.net/ubuntu/+source/unbound/1.6.7-1ubunt...

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