HIGH 7.5 Microsoft
CVE-2020-24659
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.
Microsoft Security Update 2020-Sep: 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.
Affected Products
- cm1 gnutls 3.6.14-3 on CBL Mariner 1.0
- cbl2 gnutls 3.6.14-5 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-24659
- https://nvd.nist.gov/vuln/detail/CVE-2020-24659
This high severity vulnerability with a CVSS score of 7.5 was published on 2020-09-08 via Microsoft. Affected: cm1 gnutls 3.6.14-3 on CBL Mariner 1.0, cbl2 gnutls 3.6.14-5 on CBL Mariner 2.0.
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