CVE-2020-1045

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Source
https://cve.org/CVERecord?id=CVE-2020-1045
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1045.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-1045
Aliases
Downstream
Published
2020-09-11T17:15:18.307Z
Modified
2026-07-08T05:53:31.651458579Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

<p>A security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.</p> <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> <p>The security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles encoded names.</p>

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
                {
                    "introduced": "32"
                },
                {
                    "last_affected": "32"
                },
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "redhat:enterprise_linux",
            "extracted_events": [
                {
                    "introduced": "8.0"
                },
                {
                    "last_affected": "8.0"
                }
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "8.2"
                },
                {
                    "last_affected": "8.2"
                },
                {
                    "introduced": "8.4"
                },
                {
                    "last_affected": "8.4"
                },
                {
                    "introduced": "8.6"
                },
                {
                    "last_affected": "8.6"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "redhat:enterprise_linux_aus",
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux_aus:8.2:*:*:*:*:*:*:*",
                "cpe:2.3:o:redhat:enterprise_linux_aus:8.4:*:*:*:*:*:*:*",
                "cpe:2.3:o:redhat:enterprise_linux_aus:8.6:*:*:*:*:*:*:*"
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*",
                "cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*",
                "cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "vendor_product": "redhat:enterprise_linux_eus",
            "extracted_events": [
                {
                    "introduced": "8.2"
                },
                {
                    "last_affected": "8.2"
                },
                {
                    "introduced": "8.4"
                },
                {
                    "last_affected": "8.4"
                },
                {
                    "introduced": "8.6"
                },
                {
                    "last_affected": "8.6"
                }
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "8.2"
                },
                {
                    "last_affected": "8.2"
                },
                {
                    "introduced": "8.4"
                },
                {
                    "last_affected": "8.4"
                },
                {
                    "introduced": "8.6"
                },
                {
                    "last_affected": "8.6"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "redhat:enterprise_linux_tus",
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux_tus:8.2:*:*:*:*:*:*:*",
                "cpe:2.3:o:redhat:enterprise_linux_tus:8.4:*:*:*:*:*:*:*",
                "cpe:2.3:o:redhat:enterprise_linux_tus:8.6:*:*:*:*:*:*:*"
            ]
        }
    ]
}
References

Affected packages

Git / github.com/dotnet/aspnetcore

Affected ranges

Type
GIT
Repo
https://github.com/dotnet/aspnetcore
Events
Introduced
00e08d8c11f4e9649492342c9c613a758efd2e4d
Last affected
adc6f4d362456fd5a4d6f35e66a10bb8b1660470
Introduced
03019875e4eab279a99ba3ba5ee75fb0e4935ce6
Fixed
c75b3f7a2fb9fe21fd96c93c070fdfa88a2fbe97
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "2.1"
        },
        {
            "last_affected": "2.1.21"
        },
        {
            "introduced": "3.1"
        },
        {
            "fixed": "3.1.8"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1045.json"