Auth bypass in Google Android
CVE-2021-25490
A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.008 (53.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Google Android — versions 9.0, 10.0, 11.0
- Samsung Mobile Devices — versions P(9.0), Q(10.0), R(11.0)
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-25490?
- CVE-2021-25490 is a medium-severity vulnerability in Google Android, classified under Improper Authentication. CVSS score: 6.0/10. Published 2021-10-06.
- How severe is CVE-2021-25490?
- Medium severity. CVSS v3 base score is 6.0 out of 10.
- Is CVE-2021-25490 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.