CVE-2020-13131 Information disclosure in n/a
A malicious PIV token can trigger a memory leak in libykpiv, exposing sensitive data like PINs and keys to the host application.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-13131?
CVE-2020-13131 is a medium-severity vulnerability in n/a, published on 9 Jul 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An issue was discovered in Yubico libykpiv before 2.1.0. lib/util.c in this library (which is included in yubico-piv-tool) does not properly check embedded length fields during device communication. A malicious PIV token can misreport the returned length fields during RSA key generation. This will cause stack memory to be copied into heap allocated memory that gets returned to the caller. The leaked memory could include PINs, passwords, key material, and other sensitive information depending on the integration. During further processing by the caller, this information could leak across trust boundaries. Note that RSA key generation is triggered by the host and cannot directly be triggered by the token.
Weakness: CWE-125
Which versions are affected by CVE-2020-13131?
It affects 3 products.
Products include Yubico Libykpiv, Yubico Piv Tool Manager, Yubico Yubikey Smart Card Minidriver.
How do I fix CVE-2020-13131?
Upgrade to a fixed version.
Is CVE-2020-13131 being exploited?
There is no known exploitation of CVE-2020-13131 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2020-13131, GHSA-rx8c-cr48-p2ff, UBUNTU-CVE-2020-13131.