PT-2020-4159 · Microsoft+3 · Asp.Net Core+3

Published 2020-07-01 · Updated 2024-03-06 · CVE-2020-1045

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:C/A:N

Name of the Vulnerable Software and Affected Versions: ASP.NET Core (affected versions not specified)

Description: A security feature bypass issue exists in the way 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. This could enable a remote attacker to bypass security features.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2021-1178

BDU:2020-04581

BIT-ASPNET-CORE-2020-1045

CESA-2020_3699

CVE-2020-1045

GHSA-HXRM-9W7P-39CC

RHSA-2020:3697

RHSA-2020:3699

RHSA-2020_3699

Affected Products

Alt Linux

Asp.Net Core

Centos

Red Hat

References · 22

• https://nvd.nist.gov/vuln/detail/CVE-2020-1045 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LN2FUVBSVPGK7AU3NMLO3YR6CGONQPB · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-3699.html · Vendor Advisory
• https://osv.dev/vulnerability/BIT-aspnet-core-2020-1045 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/ASICXQXS4M7MTAF6SGQMCLCA63DLCUT3 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hxrm-9w7p-39cc · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-1045 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/5LN2FUVBSVPGK7AU3NMLO3YR6CGONQPB · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ASICXQXS4M7MTAF6SGQMCLCA63DLCUT3 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-1045 · Security Note
• https://bdu.fstec.ru/vul/2020-04581 · Security Note
• https://github.com/dotnet/aspnetcore/issues/23578 · Note
• https://github.com/dotnet/aspnetcore/pull/24264 · Note
• https://github.com/dotnet/aspnetcore/issues/25701 · Note