CVE-2014-0224
OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCipherSpec messages, which allows...
- Published
- Jun 5, 2014
- Updated
- Aug 6, 2024
- Assigning CNA
- redhat
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCipherSpec messages, which allows man-in-the-middle attackers to trigger use of a zero-length master key in certain OpenSSL-to-OpenSSL communications, and consequently hijack sessions or obtain sensitive information, via a crafted TLS handshake, aka the "CCS Injection" vulnerability.
Sources
4- ccs-evalScanner
Used for evaluating hosts for CVE-2014-0224
- CVE-2014-0224Exploit
Go-based MITM exploit demo for OpenSSL CVE-2014-0224 (CCS Injection) targeting RC4-SHA cipher, with server/client proxy setup for testing TLS vulnerability.
- openssl-ccs-cve-2014-0224Scanner
Go-based tool for testing servers against the OpenSSL CCS injection vulnerability (CVE-2014-0224), using a patched TLS library to detect weak implementations.
Responsible use
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