CVE-2021-21426: Openmage/magento lts Fixes A Bug Vulnerability

CRITICAL
Advisory Identifier: GHSA-m496-x567-f98c
Share
CVSS 9.8
CWE-502
Published
Advisory Summary

CVE-2021-21426 is a CRITICAL (CVSS 9.8) fixes a bug vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Openmage/magento lts libraries in the Packagist ecosystem. The issue involves fixes a bug in zend framework's stream http wrapper. Remediation is available by upgrading affected packages to version 19.4.13, 20.0.9.

CVE-2021-21426 at a Glance

CVE Identifier CVE-2021-21426
GHSA Identifier GHSA-m496-x567-f98c
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Openmage/magento lts
Package Ecosystem Packagist
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-2021-21426

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

openmage/magento-lts fixed: 19.4.13 
Upgrade openmage/magento-lts to 19.4.13
openmage/magento-lts fixed: 20.0.9 
Upgrade openmage/magento-lts to 20.0.9
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 openmage/magento-lts

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-21426, inspect your project dependencies for Openmage/magento lts:

inspect dependencies for openmage/magento-lts

Analyze the terminal output to locate any version of Openmage/magento lts in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 19.4.13), 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-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Openmage/magento lts, 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 CVE-2021-3007: Backport of Zend_Http_Response_Stream, added certain type checking as a way to prevent exploitation. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3007 This vulnerability is caused by the unsecured deserialization of an object. In versions higher than Zend Framework 3.0.0, the attacker abuses the Zend3 feature that loads classes from objects in order to upload and execute malicious code in the server. The code can be uploaded using the “callback” parameter, which in this case inserts a malicious code instead of the “callbackOptions” array. ### Patches _Has the problem been patched? What versions should users upgrade to?_ v20.0.9 v19.4.13

CVE-2021-21426 Affected Openmage/magento lts Versions

2 component(s)
Fixed Versions:
19.4.1320.0.9
Product / Package Ecosystem Affected Versions Fixed Version
openmage/magento-lts
 Packagist
< 19.4.13
19.4.13
openmage/magento-lts
 Packagist
≥ 20.0.0
< 20.0.9
20.0.9

References

GitHub Advisory / Wiki ADVISORY
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-m496-x567-f98c
NVD — CVE-2021-21426 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21426

Frequently Asked Questions

What is CVE-2021-21426?
CVE-2021-21426 is a security vulnerability in Openmage/magento lts involving Fixes a bug in Zend Framework's Stream HTTP Wrapper under CWE-502: Deserialization of Untrusted Data.
Which Openmage/magento lts versions are affected?
Affected versions include releases prior to 19.4.13, 20.0.9 across affected packages: openmage/magento-lts.
What version fixes CVE-2021-21426?
Upgrading to 19.4.13, 20.0.9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openmage/magento-lts affected?
Yes, openmage/magento-lts is affected in releases prior to 19.4.13, 20.0.9. Upgrade your dependency to 19.4.13, 20.0.9 or later.
What is the CVSS score of CVE-2021-21426?
CVE-2021-21426 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-2021-21426?
CVE-2021-21426 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Packagist dependencies for CVE-2021-21426?
Run the dependency tree command: 'inspect dependencies for openmage/magento-lts'. 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-m496-x567-f98c",
  "modified" : "2021-04-30T20:19:58Z",
  "published" : "2021-04-22T16:10:49Z",
  "aliases" : [ "CVE-2021-21426" ],
  "summary" : "Fixes a bug in Zend Framework's Stream HTTP Wrapper",
  "details" : "### Impact\nCVE-2021-3007: Backport of Zend_Http_Response_Stream, added certain type checking as a way to prevent exploitation. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3007\n\nThis vulnerability is caused by the unsecured deserialization of an object. In versions higher than Zend Framework 3.0.0, the attacker abuses the Zend3 feature that loads classes from objects in order to upload and execute malicious code in the server. The code can be uploaded using the “callback” parameter, which in this case inserts a malicious code instead of the “callbackOptions” array.\n\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\nv20.0.9 v19.4.13",
  "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" : "openmage/magento-lts"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "19.4.13"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 19.4.12"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "openmage/magento-lts"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "20.0.0"
      }, {
        "fixed" : "20.0.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 20.0.8"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/OpenMage/magento-lts/security/advisories/GHSA-m496-x567-f98c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21426"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-21T20:16:53Z",
    "nvd_published_at" : "2021-04-21T21:15:00Z"
  }
}