CVE-2021-41355 json
.NET Core and Visual Studio Information Disclosure Vulnerability
published 2021-10-12 5 y ago modified 2026-09-08 2 mo ago also BIT-dotnet-2021-41355 , BIT-dotnet-sdk-2021-41355 , BIT-powershell-2021-41355 , EUVD-2021-2183 , GHSA-9cxh-gqpx-qc5m
- cvss
- 5.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 20.3%
- EPSS 20.3% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
.NET Core and Visual Studio Information Disclosure Vulnerability
Patch / fix
- nuget System.DirectoryServices.Protocols 5.0.1
- bitnami dotnet 5.0.1
- bitnami dotnet-sdk 5.0.1
- bitnami powershell 7.1.5
- Microsoft PowerShell 7.1 7.1.5
- Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) 16.9.12
- Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) 16.11.5
- Microsoft .NET 5.0 5.0.11
- dotnet RHEL 8 5.0.208-1.el8_4
- dotnet5.0 RHEL 8 5.0.208-1.el8_4
- dotnet-host RHEL 8 5.0.11-1.el8_4
- dotnet-sdk-5.0 RHEL 8 5.0.208-1.el8_4
- dotnet-hostfxr-5.0 RHEL 8 5.0.11-1.el8_4
- dotnet-runtime-5.0 RHEL 8 5.0.11-1.el8_4
- dotnet-templates-5.0 RHEL 8 5.0.208-1.el8_4
- aspnetcore-runtime-5.0 RHEL 8 5.0.11-1.el8_4
red hat advisories RHSA-2021:3819RHSA-2021:3818
- dotnet-sdk-5.0 AlmaLinux 8 5.0.208-1.el8_4
- dotnet-hostfxr-5.0 AlmaLinux 8 5.0.11-1.el8_4
- dotnet-runtime-5.0 AlmaLinux 8 5.0.11-1.el8_4
- dotnet-templates-5.0 AlmaLinux 8 5.0.208-1.el8_4
- aspnetcore-runtime-5.0 AlmaLinux 8 5.0.11-1.el8_4
- dotnet-apphost-pack-5.0 AlmaLinux 8 5.0.11-1.el8_4
- dotnet-targeting-pack-5.0 AlmaLinux 8 5.0.11-1.el8_4
- aspnetcore-targeting-pack-5.0 AlmaLinux 8 5.0.11-1.el8_4
almalinux advisories ALSA-2021:3819
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2021-41355 updated cvss 5.7
dotnet: System.DirectoryServices.Protocols.LdapConnection sends credentials in plaintext if TLS handshake fails
-
Red Hat .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet50-dotnet 5.0.208-1.el7_9, rh-dotnet50-dotnet-host 5.0.11-1.el7_9, rh-dotnet50-dotnet-sdk-5.0 5.0.208-1.el7_9, rh-dotnet50-dotnet-hostfxr-5.0 5.0.11-1.el7_9, rh-dotnet50-dotnet-runtime-5.0 5.0.11-1.el7_9, rh-dotnet50-dotnet-templates-5.0 5.0.208-1.el7_9, +6 more Red Hat .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet50-dotnet 5.0.208-1.el7_9, rh-dotnet50-dotnet-host 5.0.11-1.el7_9, rh-dotnet50-dotnet-sdk-5.0 5.0.208-1.el7_9, rh-dotnet50-dotnet-hostfxr-5.0 5.0.11-1.el7_9, rh-dotnet50-dotnet-runtime-5.0 5.0.11-1.el7_9, rh-dotnet50-dotnet-templates-5.0 5.0.208-1.el7_9, +6 more Red Hat .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet50-dotnet 5.0.208-1.el7_9, rh-dotnet50-dotnet-host 5.0.11-1.el7_9, rh-dotnet50-dotnet-sdk-5.0 5.0.208-1.el7_9, rh-dotnet50-dotnet-hostfxr-5.0 5.0.11-1.el7_9, rh-dotnet50-dotnet-runtime-5.0 5.0.11-1.el7_9, rh-dotnet50-dotnet-templates-5.0 5.0.208-1.el7_9, +6 morefixed: vendor fix RHSA-2021:3818
-
Red Hat Enterprise Linux AppStream (v. 8) dotnet 5.0.208-1.el8_4, dotnet5.0 5.0.208-1.el8_4, dotnet-host 5.0.11-1.el8_4, dotnet-sdk-5.0 5.0.208-1.el8_4, dotnet-hostfxr-5.0 5.0.11-1.el8_4, dotnet-runtime-5.0 5.0.11-1.el8_4, +6 morefixed: vendor fix RHSA-2021:3819
-
Red Hat .NET Core 3.1 on Red Hat Enterprise Linux rh-dotnet31-dotnet, rh-dotnet31-dotnet-host, rh-dotnet31-dotnet-sdk-3.1, rh-dotnet31-dotnet-hostfxr-3.1, rh-dotnet31-dotnet-runtime-3.1, rh-dotnet31-dotnet-templates-3.1, +6 more Red Hat Enterprise Linux 8 dotnet, dotnet3.1, dotnet-host, dotnet-sdk-3.1, dotnet-hostfxr-3.1, dotnet-runtime-3.1, +7 more Red Hat Enterprise Linux 9 dotnet3.1not affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
20.34% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C |
| GitHub | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.9 | AV:A/AC:M/Au:N/C:P/I:N/A:N |
| OSV | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | System.DirectoryServices.Protocols | <5.0.1 |
5.0.1 |
| bitnami | dotnet | >=5.0.0, <5.0.1 |
5.0.1 |
| bitnami | dotnet-sdk | >=5.0.0, <5.0.1 |
5.0.1 |
| bitnami | powershell | >=7.1.0, <7.1.5 |
7.1.5 |
Affected products
- Microsoft PowerShell 7.1
- Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)
- Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)
- Microsoft .NET 5.0
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-41355
web, patch, vendor-advisory, advisory
-
oracle.com
/security-alerts/cpujan2022.html
web, not-applicable, third-party-advisory, advisory
-
github.com
/dotnet/runtime/security/advisories/GHSA-9cxh-gqpx-qc5m
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-41355
advisory, web
-
github.com
/dotnet/runtime/issues/60301
web
-
github.com
/dotnet/runtime
package
-
msrc.microsoft.com
/update-guide/en-US/vulnerability/CVE-2021-41355
web
Sources
- CVE List CVE-2021-41355
- GitHub Advisory GHSA-9cxh-gqpx-qc5m
- NVD CVE-2021-41355
- OSV BIT-dotnet-2021-41355
- OSV BIT-dotnet-sdk-2021-41355
- OSV BIT-powershell-2021-41355
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.