CVE-2021-21426: Fixes a bug in Zend Framework's Stream HTTP Wrapper
Impact CVE-2021-3007: Backport of ZendHttpResponseStream, 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
Other sources
Fixes a bug in Zend Framework's Stream HTTP Wrapper
— Packagist
Magento-lts is a long-term support alternative to Magento Community Edition (CE). In magento-lts versions 19.4.12 and prior and 20.0.8 and prior, there is a vulnerability caused by the unsecured deserialization of an object. A patch in versions 19.4.13 and 20.0.9 was back ported from Zend Framework 3. The vulnerability was assigned CVE-2021-3007 in Zend Framework.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
composer/openmage/magento-ltsto a version that resolves this vulnerability.Fixed in 20.0.9 - Upgrade
Upgrade
composer/openmage/magento-ltsto a version that resolves this vulnerability.Fixed in 19.4.13 - Upgrade
Upgrade
magento-ltsto a version that resolves this vulnerability.Fixed in 19.4.13 - Upgrade
Upgrade
magento-ltsto a version that resolves this vulnerability.Fixed in 20.0.9
Event History
Frequently Asked Questions
What is CVE-2021-21426?
CVE-2021-21426 is a vulnerability in Magento-lts versions 19.4.12 and prior and 20.0.8 and prior.
What is the severity of CVE-2021-21426?
The severity of CVE-2021-21426 is critical with a CVSS score of 9.8.
How does CVE-2021-21426 affect Magento-lts?
CVE-2021-21426 affects Magento-lts versions 19.4.12 and prior and 20.0.8 and prior.
How can I fix CVE-2021-21426?
To fix CVE-2021-21426, update to versions 19.4.13 and 20.0.9 of Magento-lts.
Is there a patch available for CVE-2021-21426?
Yes, a patch is available in versions 19.4.13 and 20.0.9 of Magento-lts.