Vulnerability in Microsoft Asp.net_core
CVE-2020-1045
<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 coo…
EPSS: 0.060 (92.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Microsoft Asp.net_core
- Microsoft Asp.net Core 2.1 — versions 2.0
- Microsoft Asp.net Core 3.1 — versions 3.0
- Fedoraproject Fedora — versions 32, 33
- Redhat Enterprise_linux — versions 8.0
- Redhat Enterprise_linux_aus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_eus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_tus — versions 8.2, 8.4, 8.6
Public proof-of-concept exploits
References
- secure@microsoft.com (Patch, Vendor Advisory)
- secure@microsoft.com (vendor-advisory)
- secure@microsoft.com (vendor-advisory)
- secure@microsoft.com (Third Party Advisory, Release Notes)
- secure@microsoft.com (Third Party Advisory)
- secure@microsoft.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-1045?
- CVE-2020-1045 is a high-severity vulnerability in Microsoft Asp.net_core. CVSS score: 7.5/10. Published 2020-09-11.
- How severe is CVE-2020-1045?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-1045 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.