Oracle Linux: CVE-2020-24659: ELSA-2020-5483: gnutls security and bug fix update (MODERATE) (Multiple Advisories)
Description
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure. A flaw was found in GnuTLS, where the server can trigger the client to run into heap buffer overflow if a no_renegotiation alert is sent in an unexpected timing. This flaw allows the client to crash at the session deinitialization timing. The highest threat from this vulnerability is to system availability.
Solution(s)
- oracle-linux-upgrade-gnutls
- oracle-linux-upgrade-gnutls-c
- oracle-linux-upgrade-gnutls-dane
- oracle-linux-upgrade-gnutls-devel
- oracle-linux-upgrade-gnutls-utils
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