PT-2021-4320 · Cisco · Cisco Ios Xe+1

Published 2021-09-22 · Updated 2024-03-04 · CVE-2021-34699

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 IOS and Cisco IOS XE Software (affected versions not specified)

Description A vulnerability in the TrustSec CLI parser could allow an authenticated, remote attacker to cause an affected device to reload due to an improper interaction between the web UI and the CLI parser. An attacker could exploit this vulnerability by requesting a particular CLI command to be run through the web UI, resulting in a denial of service (DoS) condition.

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

DoS

Weakness Enumeration

CWE-436

CWE-435

Related Identifiers

BDU:2021-04935

CVE-2021-34699

Affected Products

Cisco Ios

Cisco Ios Xe

References · 8

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-trustsec-dos-7fuXDR2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34699 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-trustsec-dos-7fuXDR2 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/669680 · Security Note
• https://bdu.fstec.ru/vul/2021-04935 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34699 · Vendor Advisory
• https://t.me/cibsecurity/29264 · Telegram Post
• https://t.me/cvenotify/70460 · Telegram Post