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Ubuntu Security Notice USN-4451-2

Ubuntu Security Notice USN-4451-2
Posted Aug 6, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4451-2 - USN-4451-1 fixed a vulnerability in ppp. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Thomas Chauchefoin discovered that ppp incorrectly handled module loading. A local attacker could use this issue to load arbitrary kernel modules and possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-15704
SHA-256 | c68ad231253f0d6c22503e9592ba3197a3976dd3f7f4c996e8cfd1b3669e37e1

Ubuntu Security Notice USN-4451-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4451-2
August 06, 2020

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

ppp could be made to load arbitrary kernel modules and possibly run
programs.

Software Description:
- ppp: Point-to-Point Protocol (PPP)

Details:

USN-4451-1 fixed a vulnerability in ppp. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Thomas Chauchefoin discovered that ppp incorrectly handled module loading.
A local attacker could use this issue to load arbitrary kernel modules and
possibly execute arbitrary code.

Update instructions:

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

Ubuntu 14.04 ESM:
ppp 2.4.5-5.1ubuntu2.3+esm2

Ubuntu 12.04 ESM:
ppp 2.4.5-5ubuntu1.4

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

References:
https://usn.ubuntu.com/4451-2
https://usn.ubuntu.com/4451-1
CVE-2020-15704
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