Issue summary: Clients using RFC7250 Raw Public Keys (RPKs) to authenticate a server may fail to notice that the server was not authenticated, because handshakes don't abort as expected when the SSL_VERIFY_PEER verification mode is set.
Impact summary: TLS and DTLS connections using raw public keys may be vulnerable to man-in-middle attacks when server authentication failure is not detected by clients.
RPKs are disabled by default in both TLS clients and TLS servers. The issue only arises when TLS clients explicitly enable RPK use by the server, and the server, likewise, enables sending of an RPK instead of an X.509 certificate chain. The affected clients are those that then rely on the handshake to fail when the server's RPK fails to match one of the expected public keys, by setting the verification mode to SSL_VERIFY_PEER.
Clients that enable server-side raw public keys can still find out that raw public key verification failed by calling SSL_get_verify_result(), and those that do, and take appropriate action, are not affected. This issue was introduced in the initial implementation of RPK support in OpenSSL 3.2.
The FIPS modules in 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.
CVSS Details
- CVSS 3.1 Base Score: 6.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade openssl-libsUpgrade openssl-perlUpgrade openssl-develUpgrade openssl | Feb 14, 2025 | Feb 11, 2025 |
| Alpine Linux | — | Upgrade openssl | Aug 8, 2025 | Feb 11, 2025 |
| Debian | — | Upgrade openssl | Jul 27, 2026 | Jul 27, 2026 |
| Freebsd | — | Upgrade openssl32Upgrade openssl33Upgrade openssl34 | Feb 12, 2025 | Feb 11, 2025 |
| Http Openssl | — | Upgrade to the latest version of OpenSSL | Mar 5, 2026 | Feb 11, 2025 |
| Oracle_linux | — | Upgrade openssl-perlUpgrade opensslUpgrade openssl-libsUpgrade openssl-devel | Feb 13, 2025 | Feb 11, 2025 |
| Redhat_linux | — | Upgrade openssl-debuginfoUpgrade openssl-debugsourceUpgrade openssl-develUpgrade opensslUpgrade openssl-perlUpgrade openssl-libs-debuginfoUpgrade openssl-libs | Feb 12, 2025 | Feb 11, 2025 |
| Rocky_linux | — | Upgrade openssl-libs-debuginfoUpgrade opensslUpgrade openssl-perlUpgrade openssl-libsUpgrade openssl-develUpgrade openssl-debugsourceUpgrade openssl-debuginfo | Mar 18, 2025 | Feb 11, 2025 |
| Suse | — | Upgrade openssl-3Upgrade libopenssl-3-develUpgrade openssl-3-docUpgrade libopenssl-3-fips-providerUpgrade libopenssl3-x86-64-v3Upgrade libopenssl-3-fips-provider-x86-64-v3Upgrade libopenssl3Upgrade libopenssl3-32bitUpgrade libopenssl-3-fips-provider-32bit | Dec 5, 2025 | Feb 12, 2025 |
| Ubuntu | — | Upgrade libssl3t64Upgrade openssl | Feb 12, 2025 | Feb 11, 2025 |
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