CVE-2020-15704 pppd arbitrary file read information disclosure vulnerability
A local non-root attacker can exploit the MODPROBE_OPTIONS environment variable in pppd to read arbitrary root files, leading to information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-15704?
CVE-2020-15704 is a medium-severity vulnerability in Canonical ppp, published on 31 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The modprobe child process in the ./debian/patches/load_ppp_generic_if_needed patch file incorrectly handled module loading. A local non-root attacker could exploit the MODPROBE_OPTIONS environment variable to read arbitrary root files. Fixed in 2.4.5-5ubuntu1.4, 2.4.5-5.1ubuntu2.3+esm2, 2.4.7-1+2ubuntu1.16.04.3, 2.4.7-2+2ubuntu1.3, 2.4.7-2+4.1ubuntu5.1, 2.4.7-2+4.1ubuntu6. Was ZDI-CAN-11504.
Which versions are affected by CVE-2020-15704?
It affects 1 product.
Products include Canonical Ppp.
How do I fix CVE-2020-15704?
Apply the vendor's patch.
Is CVE-2020-15704 being exploited?
There is no known exploitation of CVE-2020-15704 in the wild and no public exploit code.
Sources
Also known as GHSA-2q4h-xfv6-4848, UBUNTU-CVE-2020-15704, USN-4451-1, USN-4451-2.