Vulnerability Details : CVE-2020-15957
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.
Products affected by CVE-2020-15957
- Dp3t-backend-software Development Kit Project » Dp3t-backend-software Development KitVersions before (<) 1.1.1cpe:2.3:a:dp3t-backend-software_development_kit_project:dp3t-backend-software_development_kit:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15957
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 41 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15957
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2020-15957
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-15957
-
https://github.com/DP-3T/dp3t-sdk-backend/security/advisories/GHSA-5m5q-3qw2-3xf3
Missing signature validation of JWT when alg=none · Advisory · DP-3T/dp3t-sdk-backend · GitHubPatch;Third Party Advisory
-
https://github.com/dp-3T/dp3t-sdk-backend
GitHub - DP-3T/dp3t-sdk-backend: The backend implementation for DP3TThird Party Advisory
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https://github.com/DP-3T/dp3t-sdk-backend/compare/v1.0.4...v1.1.0
Comparing v1.0.4...v1.1.0 · DP-3T/dp3t-sdk-backend · GitHubRelease Notes;Third Party Advisory
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