CVE-2020-1045
- Source
- https://cve.org/CVERecord?id=CVE-2020-1045
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-1045.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2020-1045
- Aliases
- Downstream
RHSA (2)
- Published
- 2020-09-11T17:15:18Z
- Modified
- 2026-02-20T16:37:45Z
- 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
-
A security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.
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.
The security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles encoded names.
- References
-
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LN2FUVBSVPGK7AU3NMLO3YR6CGONQPB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ASICXQXS4M7MTAF6SGQMCLCA63DLCUT3/
- https://access.redhat.com/errata/RHSA-2020:3699
- https://github.com/dotnet/core/blob/main/release-notes/3.1/3.1.8/3.1.8.md#changes-in-318
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045
- https://security.snyk.io/vuln/SNYK-RHEL8-DOTNET-1439600
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045