CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
4848 vulnerabilities reference this CWE, most recent first.
GHSA-8CM9-RRGC-4PCJ
Vulnerability from github – Published: 2024-09-12 15:33 – Updated: 2024-09-12 19:50Deserialization of untrusted data can occur in versions 2.4.0 or newer of the Cleanlab project, enabling a maliciously crafted datalab.pkl file to run arbitrary code on an end user’s system when the data directory is loaded.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "cleanlab"
},
"ranges": [
{
"events": [
{
"introduced": "2.4.0"
},
{
"last_affected": "2.6.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-45857"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2024-09-12T19:50:02Z",
"nvd_published_at": "2024-09-12T13:15:16Z",
"severity": "HIGH"
},
"details": "Deserialization of untrusted data can occur in versions 2.4.0 or newer of the Cleanlab project, enabling a maliciously crafted datalab.pkl file to run arbitrary code on an end user\u2019s system when the data directory is loaded.",
"id": "GHSA-8cm9-rrgc-4pcj",
"modified": "2024-09-12T19:50:02Z",
"published": "2024-09-12T15:33:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45857"
},
{
"type": "PACKAGE",
"url": "https://github.com/cleanlab/cleanlab"
},
{
"type": "WEB",
"url": "https://github.com/cleanlab/cleanlab/blob/v2.6.6/cleanlab/datalab/internal/serialize.py#L102-L138"
},
{
"type": "WEB",
"url": "https://hiddenlayer.com/sai-security-advisory/2024-09-cleanlab"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Cleanlab Deserialization of Untrusted Data vulnerability"
}
GHSA-8CP6-9RW3-W2Q6
Vulnerability from github – Published: 2025-12-12 06:31 – Updated: 2025-12-12 06:31The Visitor Logic Lite plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.3 via deserialization of untrusted input from the lpblocks cookie. This is due to the lp_track() function passing unsanitized cookie data directly to the unserialize() function. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code granted they can access the WordPress site.
{
"affected": [],
"aliases": [
"CVE-2025-14044"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-12T04:15:46Z",
"severity": "HIGH"
},
"details": "The Visitor Logic Lite plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.3 via deserialization of untrusted input from the `lpblocks` cookie. This is due to the `lp_track()` function passing unsanitized cookie data directly to the `unserialize()` function. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code granted they can access the WordPress site.",
"id": "GHSA-8cp6-9rw3-w2q6",
"modified": "2025-12-12T06:31:13Z",
"published": "2025-12-12T06:31:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-14044"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/logic-pro/tags/1.0.3/logic-lite.php#L131"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/logic-pro/trunk/logic-lite.php#L131"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/60fb6928-96fb-4c1f-989c-cc07965b5266?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8CPG-GFV8-MRMW
Vulnerability from github – Published: 2022-05-24 17:47 – Updated: 2022-05-24 17:47An unsafe deserialization vulnerability in Bridgecrew Checkov by Prisma Cloud allows arbitrary code execution when processing a malicious terraform file. This issue impacts Checkov 2.0 versions earlier than Checkov 2.0.26. Checkov 1.0 versions are not impacted.
{
"affected": [],
"aliases": [
"CVE-2021-3035"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-04-20T04:15:00Z",
"severity": "MODERATE"
},
"details": "An unsafe deserialization vulnerability in Bridgecrew Checkov by Prisma Cloud allows arbitrary code execution when processing a malicious terraform file. This issue impacts Checkov 2.0 versions earlier than Checkov 2.0.26. Checkov 1.0 versions are not impacted.",
"id": "GHSA-8cpg-gfv8-mrmw",
"modified": "2022-05-24T17:47:56Z",
"published": "2022-05-24T17:47:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3035"
},
{
"type": "WEB",
"url": "https://security.paloaltonetworks.com/CVE-2021-3035"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-8CWC-G9GG-QP9W
Vulnerability from github – Published: 2024-11-26 21:32 – Updated: 2024-11-26 21:32Valor Apps Easy Folder Listing Pro has a deserialization vulnerability that allows an unauthenticated, remote attacker to execute arbitrary code with the privileges of the Joomla! application. Fixed in versions 3.8 and 4.5.
{
"affected": [],
"aliases": [
"CVE-2024-11145"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-26T20:15:25Z",
"severity": "CRITICAL"
},
"details": "Valor Apps Easy Folder Listing Pro has a deserialization vulnerability that allows an unauthenticated, remote attacker to execute arbitrary code with the privileges of the Joomla! application. Fixed in versions 3.8 and 4.5.",
"id": "GHSA-8cwc-g9gg-qp9w",
"modified": "2024-11-26T21:32:24Z",
"published": "2024-11-26T21:32:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-11145"
},
{
"type": "WEB",
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/IT/white/2024/va-24-331-01.json"
},
{
"type": "WEB",
"url": "https://www.valorapps.com/web-products/easy-folder-listing-pro.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-8CWX-3WJM-CXXV
Vulnerability from github – Published: 2026-03-10 18:31 – Updated: 2026-03-10 18:31SAP NetWeaver Enterprise Portal Administration is vulnerable if a privileged user uploads untrusted or malicious content that, upon deserialization, could result in a high impact on the confidentiality, integrity, and availability of the host system.
{
"affected": [],
"aliases": [
"CVE-2026-27685"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-10T17:38:10Z",
"severity": "CRITICAL"
},
"details": "SAP NetWeaver Enterprise Portal Administration is vulnerable if a privileged user uploads untrusted or malicious content that, upon deserialization, could result in a high impact on the confidentiality, integrity, and availability of the host system.",
"id": "GHSA-8cwx-3wjm-cxxv",
"modified": "2026-03-10T18:31:17Z",
"published": "2026-03-10T18:31:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27685"
},
{
"type": "WEB",
"url": "https://me.sap.com/notes/3714585"
},
{
"type": "WEB",
"url": "https://url.sap/sapsecuritypatchday"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8F2Q-4292-VGVQ
Vulnerability from github – Published: 2026-07-23 12:32 – Updated: 2026-07-23 12:32Administrator PHP Object Injection in Complianz <= 7.5.0 versions.
{
"affected": [],
"aliases": [
"CVE-2026-65497"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-23T12:18:43Z",
"severity": "HIGH"
},
"details": "Administrator PHP Object Injection in Complianz \u003c= 7.5.0 versions.",
"id": "GHSA-8f2q-4292-vgvq",
"modified": "2026-07-23T12:32:29Z",
"published": "2026-07-23T12:32:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65497"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/complianz-gdpr/vulnerability/wordpress-complianz-plugin-7-5-0-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8F39-V287-78JF
Vulnerability from github – Published: 2026-06-04 18:30 – Updated: 2026-07-15 22:32Deserialization of Untrusted Data in the Java replace-resolve path in Apache Fory fory-core Java SDK before 1.1.0 on Java/JVM platforms allows a remote attacker to bypass class registration, TypeChecker, and DisallowedList checks and invoke classpath-present readResolve/readExternal hooks via crafted Fory serialized data.
Users are recommended to upgrade to version 1.1.0 or later, which fixes this issue.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.fory:fory-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-50076"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-15T22:32:28Z",
"nvd_published_at": "2026-06-04T17:16:33Z",
"severity": "CRITICAL"
},
"details": "Deserialization of Untrusted Data in the Java replace-resolve path in Apache Fory fory-core Java SDK before 1.1.0 on Java/JVM platforms allows a remote attacker to bypass class registration, TypeChecker, and DisallowedList checks and invoke classpath-present readResolve/readExternal hooks via crafted Fory serialized data.\n\nUsers are recommended to upgrade to version 1.1.0 or later, which fixes this issue.",
"id": "GHSA-8f39-v287-78jf",
"modified": "2026-07-15T22:32:28Z",
"published": "2026-06-04T18:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50076"
},
{
"type": "WEB",
"url": "https://fory.apache.org/security"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/fory"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2026/06/04/4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Apache Fory Java SDK Has Deserialization of Untrusted Data in the Java replace-resolve path"
}
GHSA-8F67-79JR-8VPR
Vulnerability from github – Published: 2026-07-04 03:31 – Updated: 2026-07-04 03:31picklescan before 0.0.30 fails to detect malicious pickle files that exploit lib2to3.pgen2.pgen.ParserGenerator.make_label function in the reduce method. Attackers can craft malicious pickle files with embedded code that evades detection but executes arbitrary commands when pickle.load() is called.
{
"affected": [],
"aliases": [
"CVE-2025-71343"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-04T02:16:21Z",
"severity": "HIGH"
},
"details": "picklescan before 0.0.30 fails to detect malicious pickle files that exploit lib2to3.pgen2.pgen.ParserGenerator.make_label function in the reduce method. Attackers can craft malicious pickle files with embedded code that evades detection but executes arbitrary commands when pickle.load() is called.",
"id": "GHSA-8f67-79jr-8vpr",
"modified": "2026-07-04T03:31:01Z",
"published": "2026-07-04T03:31:01Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-p9w7-82w4-7q8m"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71343"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-lib2to3-pgen2-pgen-parsergenerator-make-label-detection-bypass"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-8F77-6GMM-9PHW
Vulnerability from github – Published: 2026-06-17 18:35 – Updated: 2026-06-17 18:35Unauthenticated PHP Object Injection in Valeska <= 1.2.2 versions.
{
"affected": [],
"aliases": [
"CVE-2026-40761"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-17T13:20:37Z",
"severity": "HIGH"
},
"details": "Unauthenticated PHP Object Injection in Valeska \u003c= 1.2.2 versions.",
"id": "GHSA-8f77-6gmm-9phw",
"modified": "2026-06-17T18:35:50Z",
"published": "2026-06-17T18:35:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40761"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/theme/valeska/vulnerability/wordpress-valeska-theme-1-2-2-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8F7F-VQG5-JRV9
Vulnerability from github – Published: 2023-01-10 22:43 – Updated: 2024-07-30 21:23Microsoft Security Advisory CVE-2023-21538: .NET Denial of Service Vulnerability
Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0. 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 .NET 6.0 where a malicious client could cause a stack overflow which may result in a denial of service attack when an attacker sends an invalid request to an exposed endpoint.
Discussion
Discussion for this issue can be found at https://github.com/dotnet/runtime/issues/80449
Mitigation factors
Microsoft has not identified any mitigating factors for this vulnerability.
Affected software
- Any .NET 6.0 application running on .NET 6.0.12 or earlier.
If your application uses the following package versions, ensure you update to the latest version of .NET.
.NET 6
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.NetCore.App.Runtime.linux-arm | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.linux-arm64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.linux-musl-x64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.linux-x64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.osx-arm64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.osx-x64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.win-arm | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.win-arm64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.win-x64 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
| Microsoft.NetCore.App.Runtime.win-x86 | >= 6.0.0, <= 6.0.12 | 6.0.13 |
Advisory FAQ
How do I know if I am affected?
If you have a runtime or SDK with a version listed, or an affected package listed in affected software, you're exposed to the vulnerability.
How do I fix the issue?
- To fix the issue please install the latest version of .NET 6.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.
- If you have .NET Core 3.1 or greater installed, you can list the versions you have installed by running the
dotnet --infocommand. You will see output like the following; - If you are using one of the affected packages, please update to the patched version listed above.
.NET Core SDK (reflecting any global.json):
Version: 6.0.300
Commit: 8473146e7d
Runtime Environment:
OS Name: Windows
OS Version: 10.0.18363
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\6.0.300\
Host (useful for support):
Version: 6.0.5
Commit: 8473146e7d
.NET Core SDKs installed:
6.0.300 [C:\Program Files\dotnet\sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download
- If you're using .NET 6.0, you should download and install Runtime 6.0.13 or SDK 6.0.113 (for Visual Studio 2022 v17.1) from https://dotnet.microsoft.com/download/dotnet-core/6.0.
.NET 6.0 and and .NET 7.0 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.
Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.
Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.
Other Information
Reporting Security Issues
If you have found a potential security issue in .NET 6.0 or .NET 7.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core & .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.
Support
You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime and https://github.com/dotnet/aspnet/. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.
Disclaimer
The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
External Links
Revisions
V1.0 (January 10, 2023): Advisory published.
Version 1.0
Last Updated 2023-01-10
{
"affected": [
{
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NETCore.App.Runtime.linux-arm"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.0.13"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NETCore.App.Runtime.linux-arm64"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.0.13"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NETCore.App.Runtime.linux-musl-arm"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
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"aliases": [
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],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2023-01-10T22:43:38Z",
"nvd_published_at": "2023-01-10T22:15:00Z",
"severity": "HIGH"
},
"details": "# Microsoft Security Advisory CVE-2023-21538: .NET Denial of Service Vulnerability\n\n## \u003ca name=\"executive-summary\"\u003e\u003c/a\u003eExecutive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\nA denial of service vulnerability exists in .NET 6.0 where a malicious client could cause a stack overflow which may result in a denial of service attack when an attacker sends an invalid request to an exposed endpoint.\n## Discussion\n\nDiscussion for this issue can be found at https://github.com/dotnet/runtime/issues/80449\n\n### \u003ca name=\"mitigation-factors\"\u003e\u003c/a\u003eMitigation factors\n\nMicrosoft has not identified any mitigating factors for this vulnerability.\n\n## \u003ca name=\"affected-software\"\u003e\u003c/a\u003eAffected software\n\n* Any .NET 6.0 application running on .NET 6.0.12 or earlier.\n\nIf your application uses the following package versions, ensure you update to the latest version of .NET.\n\n### \u003ca name=\".NET 6\"\u003e\u003c/a\u003e.NET 6\n\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86)|\u003e= 6.0.0, \u003c= 6.0.12|6.0.13\n\n## Advisory FAQ\n\n### \u003ca name=\"how-affected\"\u003e\u003c/a\u003eHow do I know if I am affected?\n\nIf you have a runtime or SDK with a version listed, or an affected package listed in [affected software](#affected-software), you\u0027re exposed to the vulnerability.\n\n### \u003ca name=\"how-fix\"\u003e\u003c/a\u003eHow do I fix the issue?\n\n* To fix the issue please install the latest version of .NET 6.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.\n* If you have .NET Core 3.1 or greater installed, you can list the versions you have installed by running the `dotnet --info` command. You will see output like the following;\n* If you are using one of the affected packages, please update to the patched version listed above. \n\n```\n.NET Core SDK (reflecting any global.json):\n\n Version: 6.0.300\n Commit: 8473146e7d\n\nRuntime Environment:\n\n OS Name: Windows\n OS Version: 10.0.18363\n OS Platform: Windows\n RID: win10-x64\n Base Path: C:\\Program Files\\dotnet\\sdk\\6.0.300\\\n\nHost (useful for support):\n\n Version: 6.0.5\n Commit: 8473146e7d\n\n.NET Core SDKs installed:\n\n 6.0.300 [C:\\Program Files\\dotnet\\sdk]\n\n.NET Core runtimes installed:\n\n Microsoft.AspNetCore.App 6.0.5 [C:\\Program Files\\dotnet\\shared\\Microsoft.AspNetCore.App]\n Microsoft.NETCore.App 6.0.5 [C:\\Program Files\\dotnet\\shared\\Microsoft.NETCore.App]\n Microsoft.WindowsDesktop.App 6.0.5 [C:\\Program Files\\dotnet\\shared\\Microsoft.WindowsDesktop.App]\n\nTo install additional .NET Core runtimes or SDKs:\n https://aka.ms/dotnet-download\n```\n\n* If you\u0027re using .NET 6.0, you should download and install Runtime 6.0.13 or SDK 6.0.113 (for Visual Studio 2022 v17.1) from https://dotnet.microsoft.com/download/dotnet-core/6.0.\n\n.NET 6.0 and and .NET 7.0 updates are also available from Microsoft Update. To access this either type \"Check for updates\" in your Windows search, or open Settings, choose Update \u0026 Security and then click Check for Updates.\n\nOnce you have installed the updated runtime or SDK, restart your apps for the update to take effect.\n\nAdditionally, if you\u0027ve deployed [self-contained applications](https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd) targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf you have found a potential security issue in .NET 6.0 or .NET 7.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core \u0026 .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at \u003chttps://aka.ms/corebounty\u003e.\n\n### Support\n\nYou can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime and https://github.com/dotnet/aspnet/. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2023-21538]( https://www.cve.org/CVERecord?id=CVE-2023-21538)\n\n### Revisions\n\nV1.0 (January 10, 2023): Advisory published.\n\n_Version 1.0_\n\n_Last Updated 2023-01-10_",
"id": "GHSA-8f7f-vqg5-jrv9",
"modified": "2024-07-30T21:23:47Z",
"published": "2023-01-10T22:43:38Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/dotnet/runtime/security/advisories/GHSA-8f7f-vqg5-jrv9"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-21538"
},
{
"type": "PACKAGE",
"url": "https://github.com/dotnet/runtime"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GV5QDWYJ4C26JB7RTI55Z4O76WSH4FMV"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZI27LYW5C4Z4644WYIQWOXBZL7WIP2X6"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21538"
},
{
"type": "WEB",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21538"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": ".NET Denial of Service Vulnerability"
}
Mitigation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Mitigation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Mitigation
Explicitly define a final object() to prevent deserialization.
Mitigation
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
Mitigation
Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
Mitigation MIT-29
Strategy: Firewall
Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
CAPEC-586: Object Injection
An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.