CVE-2024-27929: SixLabors.ImageSharp Use After Free Vulnerability

HIGH
Advisory Identifier: GHSA-65x7-c272-7g7r
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CVSS 7.1
CWE-416
Published
Advisory Summary

CVE-2024-27929 is a HIGH (CVSS 7.1) use after free vulnerability (CWE-416: Use After Free) affecting SixLabors.ImageSharp libraries in the NuGet ecosystem. The issue involves use after free in sixlabors.imagesharp. Remediation is available by upgrading affected packages to version 3.1.3, 2.1.7.

CVE-2024-27929 at a Glance

CVE Identifier CVE-2024-27929
GHSA Identifier GHSA-65x7-c272-7g7r
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-416: Use After Free
Affected Product SixLabors.ImageSharp
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2024-27929

To remediate this vulnerability, upgrade all affected SixLabors.ImageSharp dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

SixLabors.ImageSharp fixed: 3.1.3 
Upgrade SixLabors.ImageSharp to 3.1.3
SixLabors.ImageSharp fixed: 2.1.7 
Upgrade SixLabors.ImageSharp to 2.1.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for SixLabors.ImageSharp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-27929, inspect your project dependencies for SixLabors.ImageSharp:

inspect dependencies for SixLabors.ImageSharp

Analyze the terminal output to locate any version of SixLabors.ImageSharp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. In SixLabors.ImageSharp, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact A heap-use-after-free flaw was found in ImageSharp's InitializeImage() function of PngDecoderCore.cs file. This vulnerability is triggered when an attacker passes a specially crafted PNG image file to ImageSharp for conversion, potentially leading to information disclosure. ### Patches The problem has been patched. All users are advised to upgrade to v3.1.3 or v2.1.7. ### Workarounds None ### References None

CVE-2024-27929 Affected SixLabors.ImageSharp Versions

2 component(s)
Fixed Versions:
3.1.32.1.7
Product / Package Ecosystem Affected Versions Fixed Version
SixLabors.ImageSharp
nuget/SixLabors.ImageSharp
NuGet
≥ 3.0.0
< 3.1.3
3.1.3
SixLabors.ImageSharp
nuget/SixLabors.ImageSharp
NuGet
< 2.1.7
2.1.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-65x7-c272-7g7r
NVD — CVE-2024-27929 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-27929
SixLabors.ImageSharp Source Repository REPOSITORY
https://github.com/SixLabors/ImageSharp/pull/2688
SixLabors.ImageSharp Source Repository REPOSITORY
https://github.com/SixLabors/ImageSharp

Frequently Asked Questions

What is CVE-2024-27929?
CVE-2024-27929 is a security vulnerability in SixLabors.ImageSharp involving Use After Free in SixLabors.ImageSharp under CWE-416: Use After Free.
Which SixLabors.ImageSharp versions are affected?
Affected versions include releases prior to 3.1.3, 2.1.7 across affected packages: SixLabors.ImageSharp.
What version fixes CVE-2024-27929?
Upgrading to 3.1.3, 2.1.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is SixLabors.ImageSharp affected?
Yes, SixLabors.ImageSharp is affected in releases prior to 3.1.3, 2.1.7. Upgrade your dependency to 3.1.3, 2.1.7 or later.
What is the CVSS score of CVE-2024-27929?
CVE-2024-27929 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2024-27929?
CVE-2024-27929 is classified under CWE-416: Use After Free (The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.).
How can I check NuGet dependencies for CVE-2024-27929?
Run the dependency tree command: 'inspect dependencies for SixLabors.ImageSharp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-65x7-c272-7g7r",
  "modified" : "2024-03-06T21:57:21Z",
  "published" : "2024-03-05T16:26:15Z",
  "aliases" : [ "CVE-2024-27929" ],
  "summary" : "Use After Free in SixLabors.ImageSharp",
  "details" : "### Impact\nA heap-use-after-free flaw was found in ImageSharp's InitializeImage() function of PngDecoderCore.cs file. This vulnerability is triggered when an attacker passes a specially crafted PNG image file to ImageSharp for conversion, potentially leading to information disclosure.\n\n### Patches\nThe problem has been patched. All users are advised to upgrade to v3.1.3 or v2.1.7.\n\n### Workarounds\nNone\n\n### References\nNone\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "SixLabors.ImageSharp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.1.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "SixLabors.ImageSharp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.1.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-65x7-c272-7g7r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-27929"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/SixLabors/ImageSharp/pull/2688"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/SixLabors/ImageSharp"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-416" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-05T16:26:15Z",
    "nvd_published_at" : "2024-03-05T17:15:07Z"
  }
}