Description
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.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-3317-1 | snort security update |
Debian DSA |
DSA-5354-1 | snort security update |
EUVD |
EUVD-2021-21399 | 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. |
References
History
Tue, 26 Nov 2024 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco secure Firewall Management Center
|
|
| CPEs | cpe:2.3:a:cisco:secure_firewall_management_center:2.9.18:*:*:*:*:*:*:* | |
| Vendors & Products |
Cisco firepower Management Center
|
Cisco secure Firewall Management Center
|
Thu, 07 Nov 2024 22:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2024-11-07T22:03:41.730Z
Reserved: 2021-06-15T00:00:00.000Z
Link: CVE-2021-34749
Updated: 2024-08-04T00:19:48.253Z
Status : Modified
Published: 2021-08-18T20:15:07.930
Modified: 2024-11-26T16:09:02.407
Link: CVE-2021-34749
No data.
OpenCVE Enrichment
No data.
Weaknesses
Debian DLA
Debian DSA
EUVD