GHSA-8q5v-6pqq-x66h

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET XML Encryption (System.Security.Cryptography.Xml). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A denial of service vulnerability exists in the XML encryption implementation (EncryptedXml) in .NET 8, .NET 9, and .NET 10. An attacker could exploit this vulnerability by supplying crafted encrypted XML that causes uncontrolled resource consumption, resulting in denial of service.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/414

CVSS Details

• Version: 3.1
• Severity: High
• Score: 7.5
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
• Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

Affected Platforms

• Platforms: All
• Architectures: All

<a name="affected-packages"></a>Affected Packages

The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below

<a name=".NET 10.0"></a>.NET 10.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- System.Security.Cryptography.Xml | >= 10.0.0, <= 10.0.9 | 10.0.10

<a name=".NET 9.0"></a>.NET 9.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- System.Security.Cryptography.Xml | >= 9.0.0, <= 9.0.17 | 9.0.18

<a name=".NET 8.0"></a>.NET 8.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- System.Security.Cryptography.Xml | >=...