Microsoft Silverlight Runtime Remote Code Execution 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: 69% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary code or cause a denial of service (object-header corruption) via a crafted web site, aka "Silverlight Runtime Remote Code Execution Vulnerability."

CISA: Microsoft Silverlight mishandles negative offsets during decoding, which allows attackers to execute remote code or cause a denial-of-service (DoS).

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 15 Jun 2022): The impacted products are 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.securitytracker.com/id/1034655Broken LinkThird Party AdvisoryVDB Entry
• docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-006PatchVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource