CVE-2022-35649: Moodle/moodle Moodle PostScript Code Injection Vulnerability

Q: What is CVE-2022-35649?

CVE-2022-35649 is a security vulnerability in Moodle/moodle involving Moodle PostScript Code Injection under CWE-20: Improper Input Validation.

Q: Which Moodle/moodle versions are affected?

Affected versions include releases prior to 3.9.15, 3.11.8, 4.0.2 across affected packages: moodle/moodle.

Q: What version fixes CVE-2022-35649?

Upgrading to 3.9.15, 3.11.8, 4.0.2 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is moodle/moodle affected?

Yes, moodle/moodle is affected in releases prior to 3.9.15, 3.11.8, 4.0.2. Upgrade your dependency to 3.9.15, 3.11.8, 4.0.2 or later.

Q: What is the CVSS score of CVE-2022-35649?

CVE-2022-35649 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.

Q: What CWE is associated with CVE-2022-35649?

CVE-2022-35649 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).

Q: How can I check Packagist dependencies for CVE-2022-35649?

Run the dependency tree command: 'inspect dependencies for moodle/moodle'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

CRITICAL

Advisory Identifier: GHSA-xp2f-9mx3-3c6p

CVSS 9.8

CWE-20

Published 2022-07-26

Advisory Summary

CVE-2022-35649 is a CRITICAL (CVSS 9.8) moodle postscript code injection vulnerability (CWE-20: Improper Input Validation) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle postscript code injection. Remediation is available by upgrading affected packages to version 3.9.15, 3.11.8, 4.0.2.

CVE-2022-35649 at a Glance

CVE Identifier CVE-2022-35649

GHSA Identifier GHSA-xp2f-9mx3-3c6p

Severity CRITICAL

CVSS v3.1 Base Score 9.8

CWE Classification CWE-20: Improper Input Validation

Affected Product Moodle/moodle

Package Ecosystem Packagist

Published Date 2022-07-26

Last Updated 2024-04-23

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-2022-35649

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

moodle/moodle fixed: 3.9.15

Upgrade moodle/moodle to 3.9.15

moodle/moodle fixed: 3.11.8

Upgrade moodle/moodle to 3.11.8

moodle/moodle fixed: 4.0.2

Upgrade moodle/moodle to 4.0.2

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 moodle/moodle

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-35649, inspect your project dependencies for Moodle/moodle:

inspect dependencies for moodle/moodle

Analyze the terminal output to locate any version of Moodle/moodle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.9.15), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Moodle/moodle, 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 vulnerability was found in Moodle, occurs due to improper input validation when parsing PostScript code. An omitted execution parameter results in a remote code execution risk for sites running GhostScript versions older than 9.50. Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

CVE-2022-35649 Affected Moodle/moodle Versions

3 component(s)

Fixed Versions:

3.9.153.11.84.0.2

Product / Package	Ecosystem	Affected Versions	Fixed Version
moodle/moodle	Packagist	≥ 3.9 < 3.9.15	3.9.15
moodle/moodle	Packagist	≥ 3.11 < 3.11.8	3.11.8
moodle/moodle	Packagist	≥ 4.0 < 4.0.2	4.0.2

References

NVD — CVE-2022-35649 NVD

https://nvd.nist.gov/vuln/detail/CVE-2022-35649

bugzilla.redhat.com/show_bug.cgi WEB

https://bugzilla.redhat.com/show_bug.cgi?id=2106273

Moodle/moodle Source Repository REPOSITORY

https://github.com/moodle/moodle

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6MOKYVRNFNAODP2XSMGJ5CRDUZCZKAR3

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTKUSFPSYFINSQFSOHDQIDVE6FWBEU6V

moodle.org/mod/forum/discuss.p... WEB

https://moodle.org/mod/forum/discuss.php?d=436456

git.moodle.org/gw WEB

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-75044

Frequently Asked Questions

What is CVE-2022-35649?

CVE-2022-35649 is a security vulnerability in Moodle/moodle involving Moodle PostScript Code Injection under CWE-20: Improper Input Validation.

Which Moodle/moodle versions are affected?

Affected versions include releases prior to 3.9.15, 3.11.8, 4.0.2 across affected packages: moodle/moodle.

What version fixes CVE-2022-35649?

Upgrading to 3.9.15, 3.11.8, 4.0.2 (or the latest patched release for your respective branch) resolves the vulnerability.

Is moodle/moodle affected?

Yes, moodle/moodle is affected in releases prior to 3.9.15, 3.11.8, 4.0.2. Upgrade your dependency to 3.9.15, 3.11.8, 4.0.2 or later.

What is the CVSS score of CVE-2022-35649?

CVE-2022-35649 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-2022-35649?

CVE-2022-35649 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).

How can I check Packagist dependencies for CVE-2022-35649?

Run the dependency tree command: 'inspect dependencies for moodle/moodle'. 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-xp2f-9mx3-3c6p",
  "modified" : "2024-04-23T23:36:31Z",
  "published" : "2022-07-26T00:00:29Z",
  "aliases" : [ "CVE-2022-35649" ],
  "summary" : "Moodle PostScript Code Injection",
  "details" : "The vulnerability was found in Moodle, occurs due to improper input validation when parsing PostScript code. An omitted execution parameter results in a remote code execution risk for sites running GhostScript versions older than 9.50. Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.",
  "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" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.9"
      }, {
        "fixed" : "3.9.15"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.11"
      }, {
        "fixed" : "3.11.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0"
      }, {
        "fixed" : "4.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-35649"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2106273"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6MOKYVRNFNAODP2XSMGJ5CRDUZCZKAR3"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTKUSFPSYFINSQFSOHDQIDVE6FWBEU6V"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=436456"
  }, {
    "type" : "WEB",
    "url" : "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-75044"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T23:36:31Z",
    "nvd_published_at" : "2022-07-25T16:15:00Z"
  }
}

CVSS V3

9.8 CRITICAL