Microsoft Internet Explorer Use-After-Free Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-28
• Known to be used in ransomware campaigns
• EPSS: 74% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, as demonstrated by VUPEN during a Pwn2Own competition at CanSecWest 2013, aka "Internet Explorer Use After Free Vulnerability," a different vulnerability than CVE-2013-1308 and CVE-2013-1309.

CISA: Use-after-free vulnerability in Microsoft Internet Explorer allows remote attackers to execute remote code via a crafted web site that triggers access to a deleted object.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 18 Apr 2022): Apply updates per vendor instructions.

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

[ References ]References

• h30499.www3.hp.com/t5/HP-Security-Research-Blog/Pwn2Own-2013/ba-p/5981157Broken LinkThird Party Advisory
• twitter.com/VUPEN/statuses/309479075385327617Broken Link
• twitter.com/thezdi/statuses/309452625173176320Not Applicable
• www.us-cert.gov/ncas/alerts/TA13-134AThird Party AdvisoryUS Government Resource
• docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-037PatchVendor Advisory
• oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16317Broken Link
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource