CVE-2019-1718

Cisco Identity Services Engine SSL Renegotiation Denial of Service Vulnerability

At a glance

Severity: MEDIUM 5.3
EPSS: EPSS 2.52 % · percentile 85 (2026-10-28)
State: PUBLISHED
Published: 2019-04-17
Updated: 2024-11-19
Assigner: cisco
NVD status: Modified

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 vulnerability is due to improper handling of Secure Sockets Layer (SSL) renegotiation requests. An attacker could exploit this vulnerability by sending renegotiation requests at a high rate. An successful exploit could increase the resource usage on the system, eventually leading to a DoS condition. This vulnerability affects version 2.1.

Scores

Version	Score	Vector	Scored by
CVSS 3.0	MEDIUM 5.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	cisco
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)
CVSS 3.0	MEDIUM 5.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	NVD · psirt@cisco.com (Secondary)
CVSS 2.0	HIGH 7.8	AV:N/AC:L/Au:N/C:N/I:N/A:C	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-399

European references

ENISA EUVD · EUVD-2019-10275
GCVE · GCVE-0-2019-1718

Affected configurations (NVD CPE)

cpe:2.3:a:cisco:identity_services_engine:2.1\(0.907\):*:*:*:*:*:*:*

Affected products

Product	Versions
Cisco · Cisco Identity Services Engine Software	affected 2.1(0.907)

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD