Vulnerability Name:

CVE-2018-15398 (CCN-150790)

Assigned:2018-10-03
Published:2018-10-03
Updated:2019-10-09
Summary:A vulnerability in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass an access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to errors that could occur when the affected software constructs and applies per-user-override rules. An attacker could exploit this vulnerability by connecting to a network through an affected device that has a vulnerable configuration. A successful exploit could allow the attacker to access resources that are behind the affected device and would typically be protected by the interface ACL.
CVSS v3 Severity:4.0 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N)
3.5 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/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): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
5.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
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-noinfo
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2018-15398

Source: BID
Type: Third Party Advisory, VDB Entry
105517

Source: CCN
Type: BID-105517
Cisco Adaptive Security Appliance CVE-2018-15398 Security Bypass Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1041788

Source: XF
Type: UNKNOWN
cisco-cve201815398-sec-bypass(150790)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20181003-asa-acl-bypass
Cisco Adaptive Security Appliance Access Control List Bypass Vulnerability

Source: CISCO
Type: Vendor Advisory
20181003 Cisco Adaptive Security Appliance Access Control List Bypass Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:adaptive_security_appliance_software:9.4(2):*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance_software:9.4(4):*:*:*:*:*:*:*
  • OR cpe:/a:cisco:adaptive_security_appliance_software:9.6(4.3):*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:cisco:firepower_threat_defense:6.2.0:*:*:*:*:*:*:*

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

    • * Denotes that component is vulnerable
    BACK
    cisco adaptive security appliance software 9.4(2)
    cisco adaptive security appliance software 9.4(4)
    cisco adaptive security appliance software 9.6(4.3)
    cisco firepower threat defense 6.2.0
    cisco adaptive security appliance -