VULNERABILITY INTELLIGENCE
CVE-2020-1045
CVSS score7.5 HIGH
EPSS probability5.93%
CISA KEVNot currently listed
Published2020-09-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Description
<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>
Weakness classification
- nvd@nist.gov: NVD-CWE-noinfo
Primary references
- secure@microsoft.com — Third Party Advisory
- secure@microsoft.com — Release Notes, Third Party Advisory
- secure@microsoft.com
- secure@microsoft.com
- secure@microsoft.com — Patch, Vendor Advisory
- secure@microsoft.com — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory