Information disclosure in Luca-App Luca
CVE-2021-33839
Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.028 (85.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mame82/misc/blob/master/luca_traceIds.md (Third Party Advisory)
- luca-app.de/securityoverview/properties/objectives.html (Vendor Advisory)
- youtu.be/jWyDfEB0m08 (Exploit, Third Party Advisory)
- twitter.com/patrick_hennig/status/1387738281757061125 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33839?
- CVE-2021-33839 is a high-severity vulnerability in Luca-App Luca, classified under Information Disclosure. CVSS score: 7.5/10. Published 2021-06-04.
- How severe is CVE-2021-33839?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33839 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.