Auth bypass in Samsung Exynos
CVE-2023-21455
Improper authorization implementation in Exynos baseband prior to SMR Mar-2023 Release 1 allows incorrect handling of unencrypted message.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Samsung Exynos
- Samsung Exynos Firmware
- Samsung Mobile Devices — versions Select devices using Exynos CP chipsets
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-21455?
- CVE-2023-21455 is a medium-severity vulnerability in Samsung Exynos, classified under Improper Authentication. CVSS score: 5.9/10. Published 2023-03-16.
- How severe is CVE-2023-21455?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2023-21455 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.