Vulnerability Name:

CVE-2020-3585 (CCN-190348)

Assigned:2019-12-12
Published:2020-10-21
Updated:2022-05-26
Summary:A vulnerability in the TLS handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 1000 Series firewalls could allow an unauthenticated, remote attacker to gain access to sensitive information. The vulnerability is due to improper implementation of countermeasures against the Bleichenbacher attack for cipher suites that rely on RSA for key exchange. An attacker could exploit this vulnerability 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 perform both of the following actions: Capture TLS traffic that is in transit between clients and the affected device Actively establish a considerable number of TLS connections to the affected device
CVSS v3 Severity:3.7 Low (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
3.2 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-203
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-3585

Source: XF
Type: UNKNOWN
cisco-cve20203585-info-disc(190348)

Source: CCN
Type: Cisco Security Advisory cisco-sa-asaftd-tls-bb-2g9uWkP
Cisco Firepower 1000 Series Bleichenbacher Attack Vulnerability

Source: CISCO
Type: Patch, Vendor Advisory
20201021 Cisco Firepower 1000 Series Bleichenbacher Attack Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* (Version >= 6.5.0 and < 6.5.0.5)
  • OR cpe:/o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* (Version >= 6.6.0 and < 6.6.1)
  • OR cpe:/o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* (Version < 6.4.0.10)
  • AND
  • cpe:/h:cisco:firepower_1010:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1120:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1140:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1000:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1150:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.14 and < 9.14.1.30)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version < 9.13.1.13)
  • AND
  • cpe:/h:cisco:firepower_1010:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1120:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1140:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1000:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:firepower_1150:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco firepower threat defense *
    cisco firepower threat defense *
    cisco firepower threat defense *
    cisco firepower 1010 -
    cisco firepower 1120 -
    cisco firepower 1140 -
    cisco firepower 1000 -
    cisco firepower 1150 -
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco firepower 1010 -
    cisco firepower 1120 -
    cisco firepower 1140 -
    cisco firepower 1000 -
    cisco firepower 1150 -