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{"affected_release": [{"advisory": "RHSA-2020:3697", "cpe": "cpe:/a:redhat:rhel_dotnet:3.1::el7", "package": "rh-dotnet31-dotnet-0:3.1.108-1.el7", "product_name": ".NET Core on Red Hat Enterprise Linux", "release_date": "2020-09-08T00:00:00Z"}, {"advisory": "RHSA-2020:3699", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "dotnet3.1-0:3.1.108-2.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-09-08T00:00:00Z"}], "bugzilla": {"description": "dotnet: ASP.NET cookie prefix spoofing vulnerability", "id": "1873451", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1873451"}, "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:H/A:N", "status": "verified"}, "cwe": "CWE-807", "details": ["<p>A security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.</p>\n<p>The ASP.NET Core cookie parser decodes entire cookie strings which could allow a malicious attacker to set a second cookie with the name being percent encoded.</p>\n<p>The security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles encoded names.</p>", "A flaw was found in ASP.NET. Certain cookie values are not properly decoded allowing a remote attacker to bypass the \"Cookie Prefixes\" security mechanism. The highest threat from this vulnerability is to data integrity."], "name": "CVE-2020-1045", "package_state": [{"cpe": "cpe:/a:redhat:rhel_dotnet:2.1", "fix_state": "Not affected", "package_name": "rh-dotnet21", "product_name": ".NET Core 2.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "dotnet", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2020-07-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-1045\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-1045\nhttps://github.com/dotnet/aspnetcore/issues/23578\nhttps://github.com/dotnet/aspnetcore/pull/24264\nhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045"], "statement": "The \"Cookie Prefixes\" feature is not used by default in ASP.NET. Successful exploitation likely requires a secondary vulnerability, for example a cross-site scripting issue.", "threat_severity": "Important"}