Vulnerability Name:

CVE-2020-3578 (CCN-190379)

Assigned:2019-12-12
Published:2020-10-21
Updated:2022-05-26
Summary:A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured access rule and access parts of the WebVPN portal that are supposed to be blocked. The vulnerability is due to insufficient validation of URLs when portal access rules are configured. An attacker could exploit this vulnerability by accessing certain URLs on the affected device.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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): Low
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:N/I:L/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:N/I:L/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): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-863
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-3578

Source: XF
Type: UNKNOWN
cisco-cve20203578-sec-bypass(190379)

Source: CCN
Type: Cisco Security Advisory cisco-sa-asaftd-rule-bypass-P73ABNWQ
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Portal Access Rule Bypass Vulnerability

Source: CISCO
Type: Patch, Vendor Advisory
20201021 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Portal Access Rule Bypass 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 and < 6.4.0.10)
  • OR cpe:/o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* (Version < 6.3.0.6)

    • Configuration 2:
  • cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.14 and < 9.14.1.19)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.13 and < 9.13.1.13)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.12 and < 9.12.4.4)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.10 and < 9.10.1.44)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.9 and < 9.9.2.80)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version < 9.6.4.45)
  • OR cpe:/o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.7 and < 9.8.4.26)

    • Configuration CCN 1:
  • cpe:/a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco firepower threat defense *
    cisco firepower threat defense *
    cisco firepower threat defense *
    cisco firepower threat defense *
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco adaptive security appliance software *
    cisco adaptive security appliance *