PT-2021-2501 · Cisco · Cisco Ios Xe

Published 2021-03-24 · Updated 2023-10-24 · CVE-2021-1435

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

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

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

Description: A vulnerability in the web UI of Cisco IOS XE Software is due to insufficient input validation, allowing an authenticated, remote attacker to inject arbitrary commands that can be executed as the root user. An attacker could exploit this vulnerability by sending a crafted request to the web UI of an affected device with arbitrary commands injected into a portion of the request. A successful exploit could allow the attacker to execute arbitrary commands as the root user.

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

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BDU:2021-01877

CVE-2021-1435

Affected Products

Cisco Ios Xe

References · 29

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webcmdinjsh-UFJxTgZD · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1435 · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webcmdinjsh-UFJxTgZD · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01877 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1435 · Security Note
• https://twitter.com/fletch_ai/status/1714145965035139160 · Twitter Post
• https://twitter.com/sherrod_im/status/1714418557340066275 · Twitter Post
• https://twitter.com/Komodosec/status/1715211127192461813 · Twitter Post
• https://bleepingcomputer.com/news/security/over-10-000-cisco-devices-hacked-in-ios-xe-zero-day-attacks · Note
• https://twitter.com/the_yellow_fall/status/1715201868841013442 · Twitter Post
• https://twitter.com/SystemTek_UK/status/1716884347431633242 · Twitter Post
• https://twitter.com/securityfreax/status/1714575975176917412 · Twitter Post
• https://twitter.com/CISACyber/status/1715101418204340734 · Twitter Post
• https://twitter.com/simplylurking2/status/1714410784078356489 · Twitter Post
• https://twitter.com/simplylurking2/status/1714410035093160107 · Twitter Post