Vulnerability Name:

CVE-2019-1693 (CCN-160407)

Assigned:2018-12-06
Published:2019-05-01
Updated:2020-10-07
Summary:A vulnerability in the WebVPN service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper management of authenticated sessions in the WebVPN portal. An attacker could exploit this vulnerability by authenticating with valid credentials and accessing a specific URL in the WebVPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a temporary DoS condition.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.7 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)
6.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-1693

Source: BID
Type: Third Party Advisory, VDB Entry
108157

Source: XF
Type: UNKNOWN
cisco-cve20191693-dos(160407)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20190501-asa-ftd-dos
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Denial of Service Vulnerability

Source: CISCO
Type: Vendor Advisory
20190501 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Denial of Service Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version < 9.4.4.34)
  • OR cpe:/a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.5 and < 9.6.4.25)
  • OR cpe:/a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.7 and < 9.8.4)
  • OR cpe:/a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.9 and < 9.9.2.50)
  • OR cpe:/a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* (Version >= 9.10 and < 9.10.1.17)
  • AND
  • cpe:/h:cisco:asa-5505:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5510:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5512-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5515-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa-5520:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5525-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa-5540:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5545-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5550:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa-5555-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5580:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5585-x:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* (Version >= 6.2.1 and < 6.2.3.12)
  • OR cpe:/a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* (Version >= 6.3.0 and < 6.3.0.3)

    • * Denotes that component is vulnerable
    BACK
    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 asa-5505 -
    cisco asa 5510 -
    cisco asa 5512-x -
    cisco asa 5515-x -
    cisco asa-5520 -
    cisco asa 5525-x -
    cisco asa-5540 -
    cisco asa 5545-x -
    cisco asa 5550 -
    cisco asa-5555-x -
    cisco asa 5580 -
    cisco asa 5585-x -
    cisco firepower threat defense *
    cisco firepower threat defense *