Microsoft Internet Explorer Use-After-Free Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-06-08
• EPSS: 80% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.

CISA: Microsoft Internet Explorer contains a use-after-free vulnerability that allows remote attackers to execute code via a crafted web site.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 22 Jun 2022): Apply updates per vendor instructions.

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

[ References ]References

• blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerabil…Broken Link
• dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows…Broken Link
• eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yetThird Party Advisory
• technet.microsoft.com/security/advisory/2757760PatchVendor Advisory
• www.kb.cert.org/vuls/id/480095Third Party AdvisoryUS Government Resource
• www.securitytracker.com/idThird Party AdvisoryVDB Entry
• www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wildThird Party Advisory
• www.us-cert.gov/cas/techalerts/TA12-255A.htmlThird Party AdvisoryUS Government Resource
• www.us-cert.gov/cas/techalerts/TA12-262A.htmlThird Party AdvisoryUS Government Resource
• www.us-cert.gov/cas/techalerts/TA12-265A.htmlThird Party AdvisoryUS Government Resource
• oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729Third Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource