Quick answers
- Is CVE-1999-0191 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-1999-0191 being exploited in the wild.
- How severe is CVE-1999-0191?
- Medium severity, with a CVSS score of 6.4, published 1 September 1997.
- Which products and versions are affected?
- Microsoft Internet Information Services (IIS).
- Is there a fix for CVE-1999-0191?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-1999-0191 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-1999-0191?
- Check whether you run Microsoft Internet Information Server or Microsoft Internet Information Services. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability exists in the newdsn.exe CGI script, which is part of the Microsoft Internet Information Services (IIS) suite. The script fails to properly validate or restrict file operations, allowing a remote, unauthenticated attacker to overwrite arbitrary files on the host system via a network request. This is a file manipulation vulnerability that can lead to unauthorized modification of data or system configuration. The attack is reachable over the network without requiring user interaction or prior authentication.
Affected products
- Microsoft Internet Information Services (IIS)
Timeline
- 1997-09-01: disclosed