Rule Document 1:39905

Report a false positive

Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself.

Alert Message

OS-WINDOWS Microsoft Windows IIS denial of service attempt

Rule Explanation

This rule looks for abnormal or large values in the TLS v1.2 Client Hello protocol handshake, which could indicate an attempt to trigger a denialofservice condition on Microsoft Windows IIS hosts.

What To Look For

This rule alerts when a specially crafted TLS v1.2 CLIENT HELLO designed to exploit a denialofservice flaw in Microsoft IIS is detected.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

No rule groups

CVE

None

Additional Links

www.virustotal.com/en/file/a9cafe63c7530e0ad5adba507e6406221c8971f6d93ec711d577605ec394f124/analysis/
portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2022-35748

Rule Vulnerability

No information provided

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.

None

MITRE ATT&CK Framework

Tactic: Impact

Technique: Service Stop

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org