CVE-2023-50781: m2crypto Bleichenbacher timing attack - incomplete fix for CVE-2020-25657

February 5, 2024 (updated February 27, 2026)

A flaw was found in m2crypto. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

References

access.redhat.com/security/cve/CVE-2023-50781
bugzilla.redhat.com/show_bug.cgi?id=2254426
github.com/advisories/GHSA-944j-8ch6-rf6x
gitlab.com/m2crypto/m2crypto
gitlab.com/m2crypto/m2crypto/-/issues/342
nvd.nist.gov/vuln/detail/CVE-2023-50781

Code Behaviors & Features

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