Description (CNA)
A vulnerability in Server Name Identification (SNI) request filtering of Cisco Web Security Appliance (WSA), Cisco Firepower Threat Defense (FTD), and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from a compromised host. This vulnerability is due to inadequate filtering of the SSL handshake. An attacker could exploit this vulnerability by using data from the SSL client hello packet to communicate with an external server. A successful exploit could allow the attacker to execute a command-and-control attack on a compromised host and perform additional data exfiltration attacks.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Cisco / Cisco Web Security Appliance (WSA) | affected n/a |
CWE
CWE-200
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sni-data-exfil-mFgzXqLN
- https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
- https://www.debian.org/security/2023/dsa-5354
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.