Vulnerabilities in pkg:pypi/libvcs

PACKAGE
Advisory Identifier: GHSA-mv2w-4jqc-6fg4
Share
Advisory Summary

CVE-2022-21187 is a CRITICAL (CVSS 8.1) command injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Libvcs libraries in the PyPI ecosystem. The issue involves command injection in libvcs and vcspull. Remediation is available by upgrading affected packages to version 0.11.1, 1.11.1.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/libvcs

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/libvcs. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-mv2w-4jqc-6fg4 CVE-2022-21187 CRITICAL Command injection in libvcs and vcspull

CVE-2022-21187 at a Glance

CVE Identifier CVE-2022-21187
GHSA Identifier GHSA-mv2w-4jqc-6fg4
Severity CRITICAL
CVSS v3.1 Base Score 8.1
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Libvcs
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.1

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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-2022-21187

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

libvcs fixed: 0.11.1 
pip install libvcs>=0.11.1
vcspull fixed: 1.11.1 
pip install vcspull>=1.11.1
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 libvcs

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-21187, inspect your installed packages using pip:

pip show libvcs

Analyze the terminal output to locate any version of Libvcs in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.11.1), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), where the product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. In Libvcs, 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

The package libvcs before 0.11.1 are vulnerable to Command Injection via argument injection. When calling the update_repo function (when using hg), the url parameter is passed to the hg clone command. By injecting some hg options it was possible to get arbitrary command execution.

CVE-2022-21187 Affected Libvcs Versions

2 component(s)
Fixed Versions:
0.11.11.11.1
Product / Package Ecosystem Affected Versions Fixed Version
libvcs
pypi/libvcs
PyPI
< 0.11.1
0.11.1
vcspull
pypi/vcspull
PyPI
< 1.11.1
1.11.1

References

NVD — CVE-2022-21187 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-21187
Libvcs Source Repository REPOSITORY
https://github.com/vcs-python/libvcs/pull/306
Security Fix Commit FIX COMMIT
https://github.com/vcs-python/vcspull/commit/e1b77128a1fa0754625b5f43d8bc47956f21f33e
Libvcs Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/libvcs/PYSEC-2022-163.yaml
Libvcs Source Repository REPOSITORY
https://github.com/vcs-python/libvcs/blob/master/CHANGES#libvcs-0111-2022-03-12
Libvcs Source Repository REPOSITORY
https://github.com/vcs-python/libvcs/blob/v0.11.1/CHANGES%23libvcs-0111-2022-03-12
Libvcs Source Repository REPOSITORY
https://github.com/vcs-python/vcspull/blob/master/CHANGES#vcspull-1111-2022-03-12
snyk.io/vuln/snyk-python-li... WEB
https://snyk.io/vuln/SNYK-PYTHON-LIBVCS-2421204

Frequently Asked Questions

What is CVE-2022-21187?
CVE-2022-21187 is a security vulnerability in Libvcs involving Command injection in libvcs and vcspull under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Libvcs versions are affected?
Affected versions include releases prior to 0.11.1, 1.11.1 across affected packages: libvcs, vcspull.
What version fixes CVE-2022-21187?
Upgrading to 0.11.1, 1.11.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is libvcs affected?
Yes, libvcs is affected in releases prior to 0.11.1. Upgrade your dependency to 0.11.1 or later.
Is vcspull affected?
Yes, vcspull is affected in releases prior to 1.11.1. Upgrade your dependency to 1.11.1 or later.
What is the CVSS score of CVE-2022-21187?
CVE-2022-21187 has a CVSS v3.1 base score of 8.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2022-21187?
CVE-2022-21187 is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.).
How can I check PyPI dependencies for CVE-2022-21187?
Run the dependency tree command: 'pip show libvcs'. 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-mv2w-4jqc-6fg4",
  "modified" : "2024-09-27T21:36:54Z",
  "published" : "2022-03-15T00:00:53Z",
  "aliases" : [ "CVE-2022-21187" ],
  "summary" : "Command injection in libvcs and vcspull",
  "details" : "The package libvcs before 0.11.1 are vulnerable to Command Injection via argument injection. When calling the update_repo function (when using hg), the url parameter is passed to the hg clone command. By injecting some hg options it was possible to get arbitrary command execution.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "libvcs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.11.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "vcspull"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.11.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-21187"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vcs-python/libvcs/pull/306"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vcs-python/vcspull/commit/e1b77128a1fa0754625b5f43d8bc47956f21f33e"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/libvcs/PYSEC-2022-163.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vcs-python/libvcs/blob/master/CHANGES#libvcs-0111-2022-03-12"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vcs-python/libvcs/blob/v0.11.1/CHANGES%23libvcs-0111-2022-03-12"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vcs-python/vcspull/blob/master/CHANGES#vcspull-1111-2022-03-12"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-PYTHON-LIBVCS-2421204"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74", "CWE-77" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-15T17:05:10Z",
    "nvd_published_at" : "2022-03-14T18:15:00Z"
  }
}