PT-2019-2133 · Cisco · Cisco Identity Services Engine

Published 2019-04-17 · Updated 2020-10-07 · CVE-2019-1718

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Cisco Identity Services Engine (ISE) version 2.1

Description A vulnerability in the web interface of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to trigger high CPU usage, resulting in a denial of service (DoS) condition. The issue is due to improper handling of Secure Sockets Layer (SSL) renegotiation requests. An attacker could exploit this by sending renegotiation requests at a high rate, increasing resource usage and potentially leading to a DoS condition.

Recommendations For version 2.1, consider restricting access to the web interface to minimize the risk of exploitation until a patch is available. As a temporary workaround, limiting the rate of SSL renegotiation requests could help mitigate the issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-399

Related Identifiers

BDU:2019-01894

CVE-2019-1718

Affected Products

Cisco Identity Services Engine

References · 5

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-ise-ssl-dos · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-1718 · Security Note
• https://osv.dev/vulnerability/CVE-2019-1718 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01894 · Security Note
• http://securityfocus.com/bid/108030 · Note