GHSA-2fh4-gpch-vqv4: Duplicate Advisory Zip Flag Bit Exploit Crashes Vulnerability

MODERATE
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CWE-345
Published
Advisory Summary

GHSA-2fh4-gpch-vqv4 is a MODERATE zip flag bit exploit crashes vulnerability (CWE-345: Insufficient Verification of Data Authenticity) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves zip flag bit exploit crashes picklescan but not pytorch. Remediation is available by upgrading affected packages to version 0.0.23.

GHSA-2fh4-gpch-vqv4 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-2fh4-gpch-vqv4
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-345: Insufficient Verification of Data Authenticity
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix GHSA-2fh4-gpch-vqv4

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

picklescan fixed: 0.0.23 
pip install picklescan>=0.0.23
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 picklescan

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-2fh4-gpch-vqv4, inspect your installed packages using pip:

pip show picklescan

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.23), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-345: Insufficient Verification of Data Authenticity, where the product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. In Duplicate Advisory, 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

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w8jq-xcqf-f792. This link is maintained to preserve external references. ## Original Description picklescan before 0.0.23 fails to detect malicious pickle files inside PyTorch model archives when certain ZIP file flag bits are modified. By flipping specific bits in the ZIP file headers, an attacker can embed malicious pickle files that remain undetected by PickleScan while still being successfully loaded by PyTorch's torch.load(). This can lead to arbitrary code execution when loading a compromised model.

GHSA-2fh4-gpch-vqv4 Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
0.0.23
Product / Package Ecosystem Affected Versions Fixed Version
picklescan
pypi/picklescan
PyPI
< 0.0.23
0.0.23

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792
NVD — GHSA-2fh4-gpch-vqv4 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-1945
Security Fix Commit FIX COMMIT
https://github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781
sites.google.com/sonatype.com/vulner... WEB
https://sites.google.com/sonatype.com/vulnerabilities/cve-2025-1945

Frequently Asked Questions

What is GHSA-2fh4-gpch-vqv4?
GHSA-2fh4-gpch-vqv4 is a security vulnerability in Duplicate Advisory involving Zip Flag Bit Exploit Crashes Picklescan But Not PyTorch under CWE-345: Insufficient Verification of Data Authenticity.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 0.0.23 across affected packages: picklescan.
What version fixes GHSA-2fh4-gpch-vqv4?
Upgrading to 0.0.23 (or the latest patched release for your respective branch) resolves the vulnerability.
Is picklescan affected?
Yes, picklescan is affected in releases prior to 0.0.23. Upgrade your dependency to 0.0.23 or later.
What CWE is associated with GHSA-2fh4-gpch-vqv4?
GHSA-2fh4-gpch-vqv4 is classified under CWE-345: Insufficient Verification of Data Authenticity (The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.).
How can I check PyPI dependencies for GHSA-2fh4-gpch-vqv4?
Run the dependency tree command: 'pip show picklescan'. 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-2fh4-gpch-vqv4",
  "modified" : "2025-03-10T18:31:03Z",
  "published" : "2025-03-10T12:30:56Z",
  "withdrawn" : "2025-03-10T18:26:09Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Zip Flag Bit Exploit Crashes Picklescan But Not PyTorch",
  "details" : "## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-w8jq-xcqf-f792. This link is maintained to preserve external references.\n\n## Original Description\npicklescan before 0.0.23 fails to detect malicious pickle files inside PyTorch model archives when certain ZIP file flag bits are modified. By flipping specific bits in the ZIP file headers, an attacker can embed malicious pickle files that remain undetected by PickleScan while still being successfully loaded by PyTorch's torch.load(). This can lead to arbitrary code execution when loading a compromised model.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "picklescan"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.23"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-1945"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781"
  }, {
    "type" : "WEB",
    "url" : "https://sites.google.com/sonatype.com/vulnerabilities/cve-2025-1945"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-345" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-10T18:26:09Z",
    "nvd_published_at" : "2025-03-10T12:15:12Z"
  }
}