CVE-2018-0764 Denial of service vulnerability exists when .NET and .NET Core improperly process XML documents
Attackers can cause a denial of service in Microsoft .NET Framework and Core by exploiting improper XML document processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-0764?
CVE-2018-0764 is a high-severity denial of service vulnerability in Microsoft .Net Framework, published on 10 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Microsoft .NET Framework 1.1, 2.0, 3.0, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 5.7 and .NET Core 1.0. 1.1 and 2.0 allow a denial of service vulnerability due to the way XML documents are processed, aka ".NET and .NET Core Denial Of Service Vulnerability". This CVE is unique from CVE-2018-0765.
Which versions are affected by CVE-2018-0764?
2 open source packages ship an affected version, including System.Security.Cryptography.Xml. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
System.Security.Cryptography.Xml NuGet | All versions | 4.4.2 |
System.Security.Cryptography.Xml NuGet | All versions | 4.4.2 |
Linux distribution packages (9)
rh-dotnetcore10-dotnetcore Red Hat:rhel_dotnet:1.0::el7 | All versions | 0:1.0.9-1.el7 |
rh-dotnetcore10-dotnetcore-debuginfo Red Hat:rhel_dotnet:1.0::el7 | All versions | 0:1.0.9-1.el7 |
rh-dotnetcore11-dotnetcore Red Hat:rhel_dotnet:1.1::el7 | All versions | 0:1.1.6-1.el7 |
rh-dotnetcore11-dotnetcore-debuginfo Red Hat:rhel_dotnet:1.1::el7 | All versions | 0:1.1.6-1.el7 |
rh-dotnet20-dotnet Red Hat:rhel_dotnet:2.0::el7 | All versions | 0:2.0.5-1.el7 |
rh-dotnet20-dotnet-debuginfo Red Hat:rhel_dotnet:2.0::el7 | All versions | 0:2.0.5-1.el7 |
rh-dotnet20-dotnet-host Red Hat:rhel_dotnet:2.0::el7 | All versions | 0:2.0.5-1.el7 |
rh-dotnet20-dotnet-runtime-2.0 Red Hat:rhel_dotnet:2.0::el7 | All versions | 0:2.0.5-1.el7 |
rh-dotnet20-dotnet-sdk-2.1 Red Hat:rhel_dotnet:2.0::el7 | All versions | 0:2.1.4-1.el7 |
Products include Microsoft .Net Core, Microsoft .Net Framework, Microsoft Powershell Core.
How do I fix CVE-2018-0764?
Upgrade System.Security.Cryptography.Xml to 4.4.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-0764 being exploited?
There is no known exploitation of CVE-2018-0764 in the wild and no public exploit code.
Other vulnerabilities in Microsoft .Net Framework
- CVE-2020-1147 Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution
- CVE-2020-0605 Code injection in .NET Core
- CVE-2020-0606 Remote code execution in Microsoft.WindowsDesktop.App.Ref
- CVE-2019-1301 High severity vulnerability that affects System.Management.Automation
- CVE-2019-0820 Regular Expression Denial of Service in System.Text.RegularExpressions
Sources
Also known as GHSA-rr3c-f55v-qhv5, RHSA-2018:0379.