CVE-2024-4420 Denial of Service in Tink-cc
An attacker can crash applications using Tink-cc by providing malformed or deeply nested JSON inputs to the JsonKeysetReader.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-4420?
CVE-2024-4420 is a medium-severity denial of service vulnerability in Google Tink, published on 21 May 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
There exists a Denial of service vulnerability in Tink-cc in versions prior to 2.1.3. * An adversary can crash binaries using the crypto::tink::JsonKeysetReader in tink-cc by providing an input that is not an encoded JSON object, but still a valid encoded JSON element, for example a number or an array. This will crash as Tink just assumes any valid JSON input will contain an object.
* An adversary can crash binaries using the crypto::tink::JsonKeysetReader in tink-cc by providing an input containing many nested JSON objects. This may result in a stack overflow.
We recommend upgrading to version 2.1.3 or above
Weakness: CWE-116
Which versions are affected by CVE-2024-4420?
It affects 1 product.
Products include Google Tink C\+\+.
How do I fix CVE-2024-4420?
No fix has been published for CVE-2024-4420 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-4420 being exploited?
There is no known exploitation of CVE-2024-4420 in the wild and no public exploit code.
Sources
Also known as GHSA-xhph-75hg-j96m.