CVE-2020-15957 Auth bypass in n/a
Attackers can bypass JWT signature verification in the DP3T Backend SDK by using the 'none' algorithm, allowing unauthorized key uploads.
- 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-2020-15957?
CVE-2020-15957 is a high-severity authentication bypass vulnerability in n/a, published on 30 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in DP3T-Backend-SDK before 1.1.1 for Decentralised Privacy-Preserving Proximity Tracing (DP3T). When it is configured to check JWT before uploading/publishing keys, it is possible to skip the signature check by providing a JWT token with alg=none.
Weakness: CWE-347
Which versions are affected by CVE-2020-15957?
It affects 1 product.
Products include Dp3t-Backend-Software Development Kit Project Dp3t-Backend-Software Development Kit.
How do I fix CVE-2020-15957?
No fix has been published for CVE-2020-15957 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-15957 being exploited?
There is no known exploitation of CVE-2020-15957 in the wild and no public exploit code.
Sources
Also known as GHSA-5m5q-3qw2-3xf3.