CVE-2018-15369

A vulnerability in the TACACS+ client subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of crafted TACACS+ response packets by the affected software. An attacker could exploit this vulnerability by injecting a crafted TACACS+ packet into an existing TACACS+ session between an affected device and a TACACS+ server or by impersonating a known, valid TACACS+ server and sending a crafted TACACS+ packet to an affected device when establishing a connection to the device. To exploit this vulnerability by using either method, the attacker must know the shared TACACS+ secret and the crafted packet must be sent in response to a TACACS+ request from a TACACS+ client. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

• CVE ID
• CVE-2018-15369

• Assigner
• ykramarz@cisco.com

• Vulnerability Status
• Modified

• Published Version
• 2018-10-05T14:29:05

• Last Modified Date
• 2019-10-09T23:35:28

• Version
• 2.0

• Vector String
• AV:N/AC:L/Au:N/C:N/I:N/A:C

• Access Vector
• NETWORK

• Access Compatibility
• LOW

• Authentication
• NONE

• Confidentiality Impact
• NONE

• Integrity Impact
• NONE

• Availability Impact
• COMPLETE

• Base Score
• 7.8

• Severity
• HIGH

• Exploitability Score
• 10

• Impact Score
• 6.9

• Version
• 3.0

• Vector String
• CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

• Attack Vector
• NETWORK

• Attack Compatibility
• HIGH

• Privileges Required
• NONE

• User Interaction
• NONE

• Scope
• CHANGED

• Confidentiality Impact
• NONE

• Availability Impact
• HIGH

• Base Score
• 6.8

• Base Severity
• MEDIUM

• Exploitability Score
• 2.2

• Impact Score
• 4