CVE-2020-1045
7.5 · HIGHOverview
CVE-2020-1045 is a high-severity vulnerability affecting microsoft asp.net_core. It was published on September 11, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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>
Remediation
Check the references section for vendor advisories and patches from microsoft. Update asp.net_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| microsoft | asp.net_core | 2.1 | Affected |
References
Frequently Asked Questions
What is CVE-2020-1045?
CVE-2020-1045 is a high-severity vulnerability affecting microsoft asp.net_core. It was published on September 11, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2020-1045?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-1045?
Check the references section for vendor advisories and patches from microsoft. Update asp.net_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-1045?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-1045 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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