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Critical Vulnerability of Plaintext Credentials in .NET 5.0 on RHEL 8

An update for .NET 5.0 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: .NET 5.0 security and bugfix update Advisory ID: RHSA-2021:3819-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3819 Issue date: 2021-10-12 CVE Names: CVE-2021-41355 ==================================================================== 1. Summary: An update for .NET 5.0 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream (v. 8) - x86_64 3. Description: .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 5.0.208 and .NET Runtime 5.0.11. Security Fix(es): * dotnet: System.DirectoryServices.Protocols.LdapConnection sends credentials in plaintext if TLS handshake fails (CVE-2021-41355) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, referto: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 2011487 - CVE-2021-41355 dotnet: System.DirectoryServices.Protocols.LdapConnection sends credentials in plaintext if TLS handshake fails 6. Package List: Red Hat Enterprise Linux AppStream (v. 8): Source: dotnet5.0-5.0.208-1.el8_4.src.rpm x86_64: aspnetcore-runtime-5.0-5.0.11-1.el8_4.x86_64.rpm aspnetcore-targeting-pack-5.0-5.0.11-1.el8_4.x86_64.rpm dotnet-5.0.208-1.el8_4.x86_64.rpm dotnet-apphost-pack-5.0-5.0.11-1.el8_4.x86_64.rpm dotnet-apphost-pack-5.0-debuginfo-5.0.11-1.el8_4.x86_64.rpm dotnet-host-5.0.11-1.el8_4.x86_64.rpm dotnet-host-debuginfo-5.0.11-1.el8_4.x86_64.rpm dotnet-hostfxr-5.0-5.0.11-1.el8_4.x86_64.rpm dotnet-hostfxr-5.0-debuginfo-5.0.11-1.el8_4.x86_64.rpm dotnet-runtime-5.0-5.0.11-1.el8_4.x86_64.rpm dotnet-runtime-5.0-debuginfo-5.0.11-1.el8_4.x86_64.rpm dotnet-sdk-5.0-5.0.208-1.el8_4.x86_64.rpm dotnet-sdk-5.0-debuginfo-5.0.208-1.el8_4.x86_64.rpm dotnet-targeting-pack-5.0-5.0.11-1.el8_4.x86_64.rpm dotnet-templates-5.0-5.0.208-1.el8_4.x86_64.rpm dotnet5.0-debuginfo-5.0.208-1.el8_4.x86_64.rpm dotnet5.0-debugsource-5.0.208-1.el8_4.x86_64.rpm netstandard-targeting-pack-2.1-5.0.208-1.el8_4.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2021-41355 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPGv1 iQIVAwUBYWXpu9zjgjWX9erEAQh76Q/+LXmiZ6vmA52x1dC0M+kvtGdrjTAzO01s jhBpNnu1zM1c3XoBEQyAG2VC+WXAM9u61nVkABBCcO25gElW6UcZsb205VXycvOy omMYZ7dz/JhULcg1UF5UOLvWtyAOG4ezogXtMsPRQ6cvKrCUWO9MQtekQfZXYLDn C9bp56IgAuKz6j5+N4/iVSqplXa8AiTA0+vhnLLW8OedJGgymo0MuwJpb13fFrSV eG7WGHK4g8Wf79nv0sojcWEU6o8/d+X/ZtOLgP8u+GFFlHVHj/GsX8t7juzt/lef RUu/5ScpjVAnzjb8pPwMjI53LfC6uCuR7jdy2jLJQesDVr+gS/nYkzA5o2cdy5Q3 xA9Y4lDPLhCb9YPC+T87ULungXlwhNedFUzrhkhUTj9v4eY2lNbDWDzI89UNMt90 SoWB/UWpCIB/AxP3GRP4f2MUuUCfKgir/s8925kAaKLzmyE1U/sFCTmCKPALC3Ys a9ybBskf0OqQ4WWlprEDkShJOB5cqCAMVos1NY+26KtQr3aUmC+VHiU7CFufqXor ySjpha2xGqckEC691i7qXwgAd1lshzJQqJ4rft7knReoYSv4ITb8s60w727igRQM 0E5bmI31rgEZH8GwN+E+Pnz7M4LOELrG+5OlE/4MGyDrEZPBu4LARFgmvVVfDpxf ydRmYIPCco8=m4wP -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . Crucial safety enhancement for .NET 5.0 on RHEL 8 responds to severe security vulnerabilities.. Red Hat Linux, .NET Security Update, Important Patch, Security Risks, Software Bugfix. . Severity: Important. LinuxSecurity.com Team

Oct 12, 2021 •Important Red Hat