CVE-2020-1045
Microsoft ASP.NET Core Security Feature Bypass Vulnerability
7.5
HIGH
CVSS 3.1
EPSS 20.4%
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>
How to fix CVE-2020-1045
To remediate CVE-2020-1045, upgrade the affected package to a fixed version below.
- —upgrade to 3.1.8 or later
- —upgrade to 2.1.22 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 3.1.8 or later
- —upgrade to 2.1.22 or later
- —upgrade to 4.1.1 or later
Is CVE-2020-1045 being exploited?
Moderate — EPSS is 20.4%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (14)
- >= 3.1.0, < 3.1.8
- from 0, < 2.1.22
- >= 3.1.0, < 3.1.8
- >= 3.1.0, < 3.1.8
- >= 3.1.0, < 3.1.8
- >= 3.1.0, < 3.1.8
- >= 3.1.0, < 3.1.8
- >= 3.1.0, < 3.1.8
- >= 3.1.0, < 3.1.8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |