Quadratic blowup in Convert::xml2array()

Impact

Silverstripe silverstripe/framework 4.x until 4.10.9 has a quadratic blowup in Convert::xml2array() that enables a remote attack via a crafted XML document.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Original source description

References

• Security advisory nvd.nist.gov/vuln/detail/CVE-2021-41559
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2021-41559.yaml
• Source reference github.com/silverstripe/silverstripe-framework/releases
• Security advisory www.silverstripe.org/download/security-releases
• Security advisory www.silverstripe.org/download/security-releases/cve-2021-41559