Information disclosure via under-tested RSA key factors
Published Dec 2, 2024 · Updated Dec 3, 2024
Insufficient entropy in Android 7, 7.1.1, 7.1.2, 8, and 8.1 allows attackers to recover information protected by weak RSA keys. RSAKeyPairGenerator.getNumberOfIterations uses the full key length instead of each candidate factor's length, selecting too few primality tests for p and q. Exposure is limited to applications that invoke the nonpublic RSAKeyPairGenerator directly; the public java.security.KeyPairGenerator path is unaffected.
Summary
What happened
Insufficient entropy in Android 7, 7.1.1, 7.1.2, 8, and 8.1 allows attackers to recover information protected by weak RSA keys. RSAKeyPairGenerator.getNumberOfIterations uses the full key length instead of each candidate factor's length, selecting too few primality tests for p and q. Exposure is limited to applications that invoke the nonpublic RSAKeyPairGenerator directly; the public java.security.KeyPairGenerator path is unaffected.
The record
- CVE
- CVE-2018-9426
- Published
- Dec 2, 2024
- Updated
- Dec 3, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-331
- Attack vector
- Unavailable
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 2, 2024CVE publishedPublication date reported by the CVE source.
- Dec 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7
- Affected versionversion=7.1.1
- Affected versionversion=7.1.2
- Affected versionversion=8
- Affected versionversion=8.1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo