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{"acknowledgement": "Red Hat would like to thank the GnuTLS project for reporting this issue.", "affected_release": [{"advisory": "RHSA-2020:5483", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "gnutls-0:3.6.14-7.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-12-15T00:00:00Z"}, {"advisory": "RHSA-2020:5483", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "gnutls-0:3.6.14-7.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-12-15T00:00:00Z"}], "bugzilla": {"description": "gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent", "id": "1872021", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1872021"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["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."], "name": "CVE-2020-24659", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "gnutls", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2020-09-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-24659\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-24659\nhttps://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04"], "statement": "This issue only affects TLS 1.3 implementation of GnuTLS which is available on GnuTLS 3.6.x branch. Therefore only GnuTLS packages shipped with Red Hat Enterprise Linux 8 are affected by this flaw.", "threat_severity": "Moderate", "upstream_fix": "gnutls 3.6.15"}