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Ubuntu Security Notice USN-4400-1

Ubuntu Security Notice USN-4400-1
Posted Jun 22, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4400-1 - It was discovered that the nfs-utils package set incorrect permissions on the /var/lib/nfs directory. An attacker could possibly use this issue to escalate privileges.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2019-3689
MD5 | c4dc39324720975af5d08962b2ee0726

Ubuntu Security Notice USN-4400-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4400-1
June 22, 2020

nfs-utils vulnerability
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

nfs-utils could be made to overwrite files as the administrator.

Software Description:
- nfs-utils: None

Details:

It was discovered that the nfs-utils package set incorrect permissions on
the /var/lib/nfs directory. An attacker could possibly use this issue to
escalate privileges.

Update instructions:

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

Ubuntu 20.04 LTS:
nfs-common 1:1.3.4-2.5ubuntu3.3

Ubuntu 19.10:
nfs-common 1:1.3.4-2.5ubuntu2.1

Ubuntu 18.04 LTS:
nfs-common 1:1.3.4-2.1ubuntu5.3

Ubuntu 16.04 LTS:
nfs-common 1:1.2.8-9ubuntu12.3

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

References:
https://usn.ubuntu.com/4400-1
CVE-2019-3689

Package Information:
https://launchpad.net/ubuntu/+source/nfs-utils/1:1.3.4-2.5ubuntu3.3
https://launchpad.net/ubuntu/+source/nfs-utils/1:1.3.4-2.5ubuntu2.1
https://launchpad.net/ubuntu/+source/nfs-utils/1:1.3.4-2.1ubuntu5.3
https://launchpad.net/ubuntu/+source/nfs-utils/1:1.2.8-9ubuntu12.3
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