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Ubuntu Security Notice USN-4400-1
June 22, 2020
nfs-utils vulnerability
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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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