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CVE-2020-1045

HIGH
Published 2020-09-11T00:00:00
Actions:

Expert Analysis

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CVSS Score

V3.1
7.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.173
probability
of exploitation in the wild

There is a 17.3% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.947
Higher than 94.7% of all CVEs

Attack Vector Metrics

Attack Vector
Not Available
Attack Complexity
Not Available
Privileges Required
Not Available
User Interaction
Not Available
Scope
Not Available

Impact Metrics

Confidentiality
Not Available
Integrity
Not Available
Availability
Not Available

Description

No description available

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Microsoft

ASP.NET Core 2.1

Affected Versions:

2.0
Microsoft

ASP.NET Core 3.1

Affected Versions:

3.0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed HIGH

Cookie parsing failure

GHSA-hxrm-9w7p-39cc

Advisory 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., aka 'Microsoft ASP.NET Core Security Feature Bypass Vulnerability'.

Affected Packages

NuGet Microsoft.AspNetCore.Http
ECOSYSTEM: ≥0 <2.1.22
NuGet Microsoft.AspNetCore.App
ECOSYSTEM: ≥0 <2.1.22
NuGet Microsoft.Owin
ECOSYSTEM: ≥0 <4.1.1
NuGet Microsoft.AspNetCore.App.Runtime.linux-arm
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-arm64
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-musl-x64
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-x64
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.osx-x64
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-arm
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-x64
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-x86
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.linux-musl-arm64
ECOSYSTEM: ≥3.1.0 <3.1.8
NuGet Microsoft.AspNetCore.App.Runtime.win-arm64
ECOSYSTEM: ≥3.1.5 <3.1.8

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-1045
WEB https://github.com/dotnet/announcements/issues/165
WEB https://github.com/dotnet/aspnetcore/issues/25701
WEB https://github.com/dotnet/aspnetcore/issues/25701#issuecomment-689434477
WEB https://github.com/github/advisory-database/issues/302
WEB https://github.com/dotnet/aspnetcore/pull/24264
WEB https://access.redhat.com/errata/RHSA-2020:3699
WEB https://github.com/dotnet/core/blob/main/release-notes/3.1/3.1.8/3.1.8.md#changes-in-318
WEB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LN2FUVBSVPGK7AU3NMLO3YR6CGONQPB
WEB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ASICXQXS4M7MTAF6SGQMCLCA63DLCUT3
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/5LN2FUVBSVPGK7AU3NMLO3YR6CGONQPB
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/ASICXQXS4M7MTAF6SGQMCLCA63DLCUT3
WEB https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045
WEB https://security.snyk.io/vuln/SNYK-RHEL8-DOTNET-1439600

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: July 7, 2022

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045
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://github.com/dotnet/core/blob/main/release-notes/3.1/3.1.8/3.1.8.md#changes-in-318
https://security.snyk.io/vuln/SNYK-RHEL8-DOTNET-1439600
https://access.redhat.com/errata/RHSA-2020:3699
Published: 2020-09-11T00:00:00
Last Modified: 2024-11-18T16:25:38.621Z
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