Vulnerability in OpenSSL
CVE-2024-12797
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.025 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000
Affected products
- OpenSSL — versions 3.4.0, 3.3.0, 3.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-library.org/news/secadv/20250211.txt (vendor-advisory)
- github.com/openssl/openssl/commit/738d4f9fdeaad57660dcba50a619fafced3fd5e9 (patch)
- github.com/openssl/openssl/commit/87ebd203feffcf92ad5889df92f90bb0ee10a699 (patch)
- github.com/openssl/openssl/commit/798779d43494549b611233f92652f0da5328fbe7 (patch)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2024-12797?
- CVE-2024-12797 is a medium-severity vulnerability in OpenSSL, classified under CWE-392. CVSS score: 6.3/10. Published 2025-02-11.
- How severe is CVE-2024-12797?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2024-12797 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.