Microsoft Silverlight Double Dereference Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-05-25
• Known to be used in ransomware campaigns
• EPSS: 79% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

Microsoft Silverlight 5, and 5 Developer Runtime, before 5.1.20125.0 does not properly validate pointers during HTML object rendering, which allows remote attackers to execute arbitrary code via a crafted Silverlight application, aka "Silverlight Double Dereference Vulnerability."

CISA: Microsoft Silverlight does not properly validate pointers during HTML object rendering, which allows remote attackers to execute code via a crafted Silverlight application.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 15 Jun 2022): The impacted product is end-of-life and should be disconnected if still in use.

• Patch on docs.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• www.us-cert.gov/ncas/alerts/TA13-071AThird Party AdvisoryUS Government Resource
• docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-022PatchVendor Advisory
• oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16516Broken Link
• oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16565Broken Link
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource