Plaintext disclosure via NULL cipher substitution
Published Oct 11, 2022 · Updated Sep 16, 2024
Information disclosure in OpenSSL 3.0.0 through 3.0.5 allows attackers to read plaintext emitted as ciphertext during custom encryption. EVP initialization incorrectly fetches a provider cipher instead of using a legacy custom cipher, causing NID_undef to match the NULL cipher. Exposure requires an application to create that custom cipher, pass it to an affected initialization call, and load a provider offering NULL; SSL/TLS-only applications are unaffected.
Summary
What happened
Information disclosure in OpenSSL 3.0.0 through 3.0.5 allows attackers to read plaintext emitted as ciphertext during custom encryption. EVP initialization incorrectly fetches a provider cipher instead of using a legacy custom cipher, causing NID_undef to match the NULL cipher. Exposure requires an application to create that custom cipher, pass it to an affected initialization call, and load a provider offering NULL; SSL/TLS-only applications are unaffected.
The record
- CVE
- CVE-2022-3358
- Published
- Oct 11, 2022
- Updated
- Sep 16, 2024
- Vendor
- OpenSSL Project
- Product
- OpenSSL
- Classifications
- CWE-476
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 11, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 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=Fixed in OpenSSL 3.0.6 (Affected 3.0.0-3.0.5)
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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