Vulnerability Name:

CVE-2021-1435 (CCN-198708)

Assigned:2020-11-13
Published:2021-03-24
Updated:2021-03-29
Summary:A vulnerability in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to inject arbitrary commands that can be executed as the root user. This vulnerability is due to insufficient input validation. 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.
CVSS v3 Severity:7.2 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.6 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
5.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:9.0 High (CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
7.1 High (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-22
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-1435

Source: XF
Type: UNKNOWN
cisco-cve20211435-cmd-exec(198708)

Source: CCN
Type: Cisco Security Advisory cisco-sa-iosxe-webcmdinjsh-UFJxTgZD
Cisco IOS XE Software Web UI Command Injection Vulnerability

Source: CISCO
Type: Vendor Advisory
20210324 Cisco IOS XE Software Web UI Command Injection Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:16.9.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.1b:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.1c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.1d:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.2a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.3a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.3h:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.3s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.4:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.4c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.5:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.5f:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.9.6:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1b:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1d:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1f:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1g:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:cisco:ios_xe_software:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe 16.9.1
    cisco ios xe 16.9.1a
    cisco ios xe 16.9.1b
    cisco ios xe 16.9.1c
    cisco ios xe 16.9.1d
    cisco ios xe 16.9.1s
    cisco ios xe 16.9.2
    cisco ios xe 16.9.2a
    cisco ios xe 16.9.2s
    cisco ios xe 16.9.3
    cisco ios xe 16.9.3a
    cisco ios xe 16.9.3h
    cisco ios xe 16.9.3s
    cisco ios xe 16.9.4
    cisco ios xe 16.9.4c
    cisco ios xe 16.9.5
    cisco ios xe 16.9.5f
    cisco ios xe 16.9.6
    cisco ios xe 16.10.1
    cisco ios xe 16.10.1a
    cisco ios xe 16.10.1b
    cisco ios xe 16.10.1c
    cisco ios xe 16.10.1d
    cisco ios xe 16.10.1e
    cisco ios xe 16.10.1f
    cisco ios xe 16.10.1g
    cisco ios xe 16.10.1s
    cisco ios xe 16.10.2
    cisco ios xe 16.10.3
    cisco ios xe 16.11.1
    cisco ios xe 16.11.1a
    cisco ios xe 16.11.1b
    cisco ios xe 16.11.1c
    cisco ios xe 16.11.1s
    cisco ios xe 16.11.2
    cisco ios xe 17.2.1v
    cisco ios xe software *