PT-2021-4734 · Cisco · Cisco Ios Xe Sd-Wan

James Spadaro · Published 2021-09-22 · Updated 2023-05-22 · CVE-2021-34724

Positive Technologies (AI Summary)

CVSS v2.0

6.6

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco IOS XE SD-WAN Software (affected versions not specified)

Description A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to elevate privileges and execute arbitrary code on the underlying operating system as the root user. An attacker must be authenticated on an affected device as a PRIV15 user. This vulnerability is due to insufficient file system protection and the presence of a sensitive file in the bootflash directory on an affected device. An attacker could exploit this vulnerability by overwriting an installer file stored in the bootflash directory with arbitrary commands that can be executed with root-level privileges. A successful exploit could allow the attacker to read and write changes to the configuration database on the affected device.

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

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2021-05443

CVE-2021-34724

Affected Products

Cisco Ios Xe Sd-Wan

References · 7

• https://osv.dev/vulnerability/CVE-2021-34724 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34724 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-privesc-VP4FG3jD · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05443 · Security Note
• https://t.me/cibsecurity/29268 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021092306 · Note
• https://t.me/cvenotify/21326 · Telegram Post