Lucene search
K
Database
Vendors
Products
Years
CVSS
Scanner
Agent Scanning
API Scanning
Manual Audit
Perimeter Scanner
Scanning
Projects
Email
Webhook
Plugins
Resources
Documents
Blog
Glossary
FAQ
Pricing
Contacts
About Us
Partners
Branding Guideline
githubGitHub Advisory DatabaseGHSA-GHHP-997W-QR28
HistoryApr 21, 2021 - 7:38 p.m.

.NET Core Remote Code Execution Vulnerability

2021-04-2119:38:01
GitHub Advisory Database
github.com
528

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.081 Low

EPSS

Percentile

94.3%

JSON

.NET Core Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-24112.

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0, .NET Core 3.1, and .NET Core 2.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A remote code execution vulnerability exists in .NET 5 and .NET Core due to how text encoding is performed.

Discussion

Discussion for this issue can be found at dotnet/runtime#49377

Mitigation factors

Microsoft has not identified any mitigating factors for this vulnerability.

Affected software

The vulnerable package is System.Text.Encodings.Web . Upgrading your package and redeploying your app should be sufficient to address this vulnerability.

Vulnerable package versions:

Any .NET 5, .NET Core, or .NET Framework based application that uses the System.Text.Encodings.Web package with a vulnerable version listed below.

Package Name Vulnerable Versions Secure Versions
System.Text.Encodings.Web 4.0.0 - 4.5.0 4.5.1
System.Text.Encodings.Web 4.6.0-4.7.1 4.7.2
System.Text.Encodings.Web 5.0.0 5.0.1

Please validate that each of the .NET versions you are using is in support. Security updates are only provided for supported .NET versions.

Affected configurations

Vulners
Node
microsoftsystem.text.encodings.webMatch5.0.0asp.net
OR
microsoftsystem.text.encodings.webRange<4.7.2asp.net
OR
microsoftsystem.text.encodings.webRange<4.5.1asp.net

References

Related

nessus 20
github 1
osv 8
oraclelinux 3
altlinux 25
cvelist 2
archlinux 6
fedora 10
cve 2
mscve 2
thn 2
redhatcve 2
paloalto 1
redhat 6
nvd 2
openvas 10
ibm 5
prion 2
almalinux 3
veracode 2
kaspersky 1
malwarebytes 1
threatpost 1
rapid7blog 1
oracle 1
nessus
nessus
Oracle Linux 8 : SUMM: / dotnet3.1 (ELSA-2021-0790)
2021-03-10 00:00:00
Fedora 32 : dotnet3.1 (2021-265a3c7cb9)
2021-03-29 00:00:00
Fedora 33 : dotnet5.0 (2021-1b22f31541)
2021-03-23 00:00:00
github
github
.NET Core Remote Code Execution Vulnerability
2022-05-24 17:43:19
osv
osv
.NET Core Remote Code Execution Vulnerability
2022-05-24 17:43:19
.NET Core Remote Code Execution Vulnerability
2021-04-21 19:38:01
BIT-dotnet-sdk-2021-26701
2024-03-06 11:00:00
oraclelinux
oraclelinux
dotnet security and bugfix update
2021-03-10 00:00:00
.NET Core on OL 8 security and bugfix update
2021-03-11 00:00:00
dotnet3.1 security and bugfix update
2021-03-10 00:00:00
altlinux
altlinux
Security fix for the ALT Linux 10 package dotnet-runtime-7.0 version 5.0.5-alt1
2021-04-17 00:00:00
Security fix for the ALT Linux 9 package dotnet-bootstrap-5.0 version 5.0.5-alt1
2021-04-17 00:00:00
Security fix for the ALT Linux 9 package dotnet-bootstrap-3.1 version 3.1.14-alt1
2021-04-17 00:00:00
cvelist
cvelist
CVE-2021-26701 .NET Core Remote Code Execution Vulnerability
2021-02-25 23:02:00
CVE-2021-24112 .NET Core Remote Code Execution Vulnerability
2021-02-25 23:01:57
archlinux
archlinux
[ASA-202103-23] dotnet-sdk-3.1: arbitrary code execution
2021-03-25 00:00:00
[ASA-202103-22] dotnet-runtime-3.1: arbitrary code execution
2021-03-25 00:00:00
[ASA-202103-20] dotnet-runtime: arbitrary code execution
2021-03-25 00:00:00
fedora
fedora
[SECURITY] Fedora 33 Update: dotnet3.1-3.1.113-1.fc33
2021-03-27 01:11:47
[SECURITY] Fedora 32 Update: dotnet3.1-3.1.113-1.fc32
2021-03-27 01:24:04
[SECURITY] Fedora 33 Update: dotnet5.0-5.0.104-1.fc33
2021-03-23 01:34:49
cve
cve
CVE-2021-26701
2021-02-25 23:15:16
CVE-2021-24112
2021-02-25 23:15:16
mscve
mscve
.NET Core Remote Code Execution Vulnerability
2021-02-09 08:00:00
.NET Core Remote Code Execution Vulnerability
2021-02-09 08:00:00
thn
thn
Microsoft Urges Azure Users to Update PowerShell to Patch RCE Flaw
2021-07-05 06:42:00
Microsoft Issues Patches for In-the-Wild 0-day and 55 Others Windows Bugs
2021-02-10 04:44:00
redhatcve
redhatcve
CVE-2021-26701
2021-03-01 15:40:09
CVE-2021-24112
2021-03-01 15:38:56
paloalto
paloalto
Informational: Impact of Microsoft PowerShell Vulnerability CVE-2021-26701 on Cortex XSOAR
2021-08-11 16:00:00
redhat
redhat
(RHSA-2021:0790) Important: dotnet3.1 security and bugfix update
2021-03-09 19:46:05
(RHSA-2021:0787) Important: .NET Core 2.1 on Red Hat Enterprise Linux security and bugfix update
2021-03-09 19:43:26
(RHSA-2021:0788) Important: dotnet security and bugfix update
2021-03-09 19:44:45
nvd
nvd
CVE-2021-24112
2021-02-25 23:15:16
CVE-2021-26701
2021-02-25 23:15:16
openvas
openvas
Fedora: Security Advisory for dotnet3.1 (FEDORA-2021-3da33cdc80)
2021-03-27 00:00:00
Fedora: Security Advisory for dotnet3.1 (FEDORA-2021-265a3c7cb9)
2021-03-27 00:00:00
Fedora: Security Advisory for dotnet5.0 (FEDORA-2021-904d0bd496)
2021-03-22 00:00:00
ibm
ibm
Security Bulletin: Vulnerability of System.Text.Encodings.Web.4.5.0 .dll has afftected to .NET Agent
2023-07-11 11:31:57
Security Bulletin: Vulnerability in Microsoft .NET Core and Visual Studio affects IBM Process Mining . CVE-2021-26701
2023-02-01 20:04:18
Security Bulletin: Vulnerabilty in the .NET Core Framework may affect IBM Robotic Process Automation and could allow an attacker to remotely execute arbitrary code.
2024-06-13 15:43:49
prion
prion
Remote code execution
2021-02-25 23:15:00
Remote code execution
2021-02-25 23:15:00
almalinux
almalinux
Important: dotnet3.1 security and bugfix update
2021-03-09 19:46:05
Important: .NET Core on RHEL 8 security and bugfix update
2021-03-09 20:33:04
Important: dotnet security and bugfix update
2021-03-09 19:44:45
veracode
veracode
Remote Code Execution
2021-04-14 03:10:39
Remote Code Execution (RCE)
2023-05-26 05:48:32
kaspersky
kaspersky
KLA12073 Multiple vulnerabilities in Microsoft Developer Tools
2021-02-09 00:00:00
malwarebytes
malwarebytes
Big Patch Tuesday: Microsoft and Adobe fix in-the-wild exploits
2021-02-10 17:26:33
threatpost
threatpost
Actively Exploited Windows Kernel Bug Allows Takeover
2021-02-09 22:33:08
rapid7blog
rapid7blog
Patch Tuesday - February 2021
2021-02-09 23:51:27
oracle
oracle
Oracle Critical Patch Update Advisory - July 2023
2023-07-18 00:00:00

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.081 Low

EPSS

Percentile

94.3%

JSON
Related for GHSA-GHHP-997W-QR28
nessus20github1osv8oraclelinux3altlinux25cvelist2archlinux6fedora10cve2mscve2thn2redhatcve2paloalto1redhat6nvd2openvas10ibm5prion2almalinux3veracode2kaspersky1malwarebytes1threatpost1rapid7blog1oracle1