Cisco StarOS Privilege Escalation Vulnerability

Published 6 y ago 2020-10-08 · modified 4 mo ago 2026-06-17 · JSON

CVSS

6.3

v3.1 · CNA

CISA KEV

not known exploited

EPSS

0.4%

percentile 33%

Public exploits

none known

A vulnerability in the CLI of Cisco StarOS operating system for Cisco ASR 5000 Series Routers could allow an authenticated, local attacker to elevate privileges on an affected device. The vulnerability is due to insufficient input validation of CLI commands. An attacker could exploit this vulnerability by sending crafted commands to the CLI. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the root user on the affected device. To exploit this vulnerability, an attacker would need to have valid credentials on an affected device and know the password for the cli test-commands command.

CISA SSVC assessment

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago 2024-11-13

Exploit prediction (EPSS)

0.39% probability of exploitation in the next 30 days, higher than 33% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	3.1	6.3	`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H`
CNA	3.1	6.3	`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H`
NVD	3.1	6.7	`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	7.2	`AV:L/AC:L/Au:N/C:C/I:C/A:C`

Affected products

Cisco Cisco ASR 5000 Series Software

Classification

Weakness

CWE-20 Improper Input Validation
CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-staros-privilege-esc-pyb7YTd · vendor-advisory, x_refsource_CISCO, x_transferred

Sources

CVE List: CVE-2020-3602
NVD: CVE-2020-3602

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary