CVE-2023-29824: Withdrawn Use After Free Vulnerability

CRITICAL
Advisory Identifier: GHSA-jrfm-2h82-xg28
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CVSS 9.8
CWE-416
Published
Advisory Summary

CVE-2023-29824 is a CRITICAL (CVSS 9.8) use after free vulnerability (CWE-416: Use After Free) affecting Withdrawn libraries in the PyPI ecosystem. The issue involves use after free in scipy. Remediation is available by upgrading affected packages to version 1.8.0.

CVE-2023-29824 at a Glance

CVE Identifier CVE-2023-29824
GHSA Identifier GHSA-jrfm-2h82-xg28
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-416: Use After Free
Affected Product Withdrawn
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

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

How to Fix CVE-2023-29824

To remediate this vulnerability, upgrade all affected Withdrawn dependencies to a patched release.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

scipy fixed: 1.8.0 
pip install scipy>=1.8.0
Verify Direct and Transitive Dependencies

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

pip show scipy

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2023-29824, inspect your installed packages using pip:

pip show scipy

Analyze the terminal output to locate any version of Withdrawn in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.8.0), your application is affected.

Note: The pip show scipy command checks currently installed packages in your active Python environment.

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 Withdrawn, 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

## Withdrawn Advisory This advisory has been withdrawn because it has been found to not be an issue. Please see the issue [here](https://github.com/scipy/scipy/issues/14713#issuecomment-1629468565) for more information. ## Original Description A use-after-free issue was discovered in Py_FindObjects() function in SciPy versions prior to 1.8.0.

CVE-2023-29824 Affected Withdrawn Versions

1 component(s)
Fixed Versions:
1.8.0
Product / Package Ecosystem Affected Versions Fixed Version
scipy
pypi/scipy
PyPI
< 1.8.0
1.8.0

References

NVD — CVE-2023-29824 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-29824
Withdrawn Source Repository REPOSITORY
https://github.com/scipy/scipy/issues/14713
Withdrawn Source Repository REPOSITORY
https://github.com/scipy/scipy/issues/14713#issuecomment-1629468565
Withdrawn Source Repository REPOSITORY
https://github.com/scipy/scipy/pull/15013
Security Fix Commit FIX COMMIT
https://github.com/scipy/scipy/commit/e32fc2329d3dd23298725153c5b2cc7fcd0f14f1
www.square16.org/achievement/cve-202... WEB
http://www.square16.org/achievement/cve-2023-29824

Frequently Asked Questions

What is CVE-2023-29824?
CVE-2023-29824 is a security vulnerability in Withdrawn involving Use after free in SciPy under CWE-416: Use After Free.
Which Withdrawn versions are affected?
Affected versions include releases prior to 1.8.0 across affected packages: scipy.
What version fixes CVE-2023-29824?
Upgrading to 1.8.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is scipy affected?
Yes, scipy is affected in releases prior to 1.8.0. Upgrade your dependency to 1.8.0 or later.
What is the CVSS score of CVE-2023-29824?
CVE-2023-29824 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-29824?
CVE-2023-29824 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 PyPI dependencies for CVE-2023-29824?
Run the dependency tree command: 'pip show scipy'. 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-jrfm-2h82-xg28",
  "modified" : "2024-05-03T10:26:19Z",
  "published" : "2023-07-06T21:30:28Z",
  "withdrawn" : "2024-05-03T10:26:19Z",
  "aliases" : [ "CVE-2023-29824" ],
  "summary" : "Withdrawn: Use after free in SciPy",
  "details" : "## Withdrawn Advisory\n\nThis advisory has been withdrawn because it has been found to not be an issue. Please see the issue [here](https://github.com/scipy/scipy/issues/14713#issuecomment-1629468565) for more information.\n\n ## Original Description\n\nA use-after-free issue was discovered in Py_FindObjects() function in SciPy versions prior to 1.8.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "scipy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.8.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-29824"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/scipy/scipy/issues/14713"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/scipy/scipy/issues/14713#issuecomment-1629468565"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/scipy/scipy/pull/15013"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/scipy/scipy/commit/e32fc2329d3dd23298725153c5b2cc7fcd0f14f1"
  }, {
    "type" : "WEB",
    "url" : "http://www.square16.org/achievement/cve-2023-29824"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-416" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-22T18:55:58Z",
    "nvd_published_at" : "2023-07-06T21:15:09Z"
  }
}