Vulnerability Name:

CCN-118947

Published:2016-11-15
Updated:2016-11-15
Summary:Multiple products are vulnerable to a denial of service. By sending specially crafted ICMP with Type 3 Code 3 packets to target firewall devices that have ICMP enabled on the outside, an attacker could exploit this vulnerability to cause high CPU usage and prevent internal traffic from reaching the internet.

Note: This vulnerability is known at the "BlackNurse" attack.
CVSS v3 Severity:7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
7.1 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/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): None
Availibility (A): High
CVSS v2 Severity:7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Consequences:Denial of Service
References:Source: CCN
Type: BlackNurse Web site
BlackNurse

Source: XF
Type: UNKNOWN
multiple-blacknurse-dos(118947)

Source: CCN
Type: Packet Storm Security [11-15-2016]
BlackNurse Spoofed ICMP Denial Of Service Proof Of Concept

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/a:zyxel:zywall:1050:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5550:*:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5515-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5525-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asa_5515-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:fortinet:fortigate-1000:3.00:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    zyxel zywall 1050
    cisco asa 5550 *
    cisco asa 5515-x -
    cisco asa 5525-x -
    cisco asa 5515-x -
    fortinet fortigate-1000 3.00