PT-2021-4137 · Cisco · Cisco Ios Xr

Published 2021-09-08 · Updated 2021-09-21 · CVE-2021-34728

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software (affected versions not specified)

Description The issue exists due to insufficient input validation in the CLI component of Cisco IOS XR Software. This could allow an authenticated, local attacker with a low-privileged account to elevate privileges on an affected device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

BDU:2021-04730

CVE-2021-34728

Affected Products

Cisco Ios Xr

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-34728 · Security Note
• https://bdu.fstec.ru/vul/2021-04730 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34728 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privescal-dZYMrKf · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privescal-dZYMrKf?vsfCisco20Security20AdvisoryvscatSecurity20IntelligencevstypeRSSvspCisco20IOS20XR20Software20Authenticated20User20Privilege20Escalation20Vulnerabilitiesvsk1 · Note