Detections
Analytics
Cisco Firepower Threat Defense 1000 Series Bleichenbacher Attack (cisco-sa-asaftd-tls-bb-2g9uWkP)
low Nessus Plugin ID 149471
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, the TLS handler of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 1000 Series firewalls is affected by the Bleichenbacher attack vulnerability due to improper implementation of countermeasures against the Bleichenbacher attack for cipher suites that rely on RSA for key exchange. An unauthenticated, remote attacker can exploit this by sending crafted TLS messages to the device, which would act as an oracle and allow the attacker to carry out a chosen-ciphertext attack. A successful exploit could allow the attacker to perform cryptanalytic operations that may allow decryption of previously captured TLS sessions to the affected device. To exploit this vulnerability, an attacker must be able to capture TLS traffic that is in transit between clients and the affected device, and actively establish a considerable number of TLS connections to the affected device.Please see the included Cisco BID and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvv13993See Also
Plugin Details
Severity: Low
ID: 149471
File Name: cisco-sa-asaftd-tls-bb-2g9uWkP-ftd.nasl
Version: 1.4
Type: local
Family: CISCO
Published: 5/13/2021
Updated: 5/17/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 1.4
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2020-3585
CVSS v3
Risk Factor: Low
Base Score: 3.7
Temporal Score: 3.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:cisco:firepower_threat_defense, cpe:/o:cisco:firepower_threat_defense
Required KB Items: installed_sw/Cisco Firepower Threat Defense
Exploit Ease: No known exploits are available
Patch Publication Date: 10/21/2020
Vulnerability Publication Date: 10/21/2020
Reference Information
CVE: CVE-2020-3585