PT-2021-2046 · Microsoft+3 · Visual Studio+4

Published 2021-02-09 · Updated 2024-03-06 · CVE-2021-1721

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

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

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

Description: The issue is related to insufficient input validation, which can be exploited by a remote attacker to cause a denial of service. This vulnerability exists when creating HTTPS web requests during X509 certificate chain building.

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-2021-1356

ALT-PU-2021-1357

ALT-PU-2021-1358

ALT-PU-2021-1359

ALT-PU-2021-1363

BDU:2021-00893

BIT-DOTNET-2021-1721

BIT-DOTNET-SDK-2021-1721

CESA-2021_0471

CESA-2021_0474

CESA-2021_0476

CVE-2021-1721

GHSA-3GP9-H8HW-PXPW

RHSA-2021:0470

RHSA-2021:0471

RHSA-2021:0472

RHSA-2021:0473

RHSA-2021:0474

RHSA-2021:0476

RHSA-2021_0471

RHSA-2021_0474

RHSA-2021_0476

Affected Products

Net Core

Alt Linux

Centos

Red Hat

Visual Studio

References · 17

• https://linux.oracle.com/errata/ELSA-2021-0474.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00893 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1721 · Security Note
• https://osv.dev/vulnerability/BIT-dotnet-sdk-2021-1721 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-0476.html · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-dotnet-2021-1721 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1721 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-3gp9-h8hw-pxpw · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-0471.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1721 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-1721 · Security Note
• https://github.com/dotnet/runtime/issues/48067 · Note
• https://github.com/dotnet/announcements/issues/175 · Note
• https://t.me/cvenotify/19419 · Telegram Post