CVE-2018-12556 Supply chain in n/a
Attackers can distribute malicious Yarn packages by signing them with arbitrary keys, bypassing signature verification in the installation script.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-12556?
CVE-2018-12556 is a medium-severity vulnerability in n/a, published on 16 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The signature verification routine in install.sh in yarnpkg/website through 2018-06-05 only verifies that the yarn release is signed by any (arbitrary) key in the local keyring of the user, and does not pin the signature to the yarn release key, which allows remote attackers to sign tampered yarn release packages with their own key.
Weakness: CWE-347
Which versions are affected by CVE-2018-12556?
It affects 1 product.
Products include Yarnpkg Website.
How do I fix CVE-2018-12556?
No fix has been published for CVE-2018-12556 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-12556 being exploited?
There is no known exploitation of CVE-2018-12556 in the wild and no public exploit code.
Sources
Also known as GHSA-8mxx-g9vw-r875, UBUNTU-CVE-2018-12556.