Vulnerability Name:

CVE-2021-1434 (CCN-198701)

Assigned:2020-11-13
Published:2021-03-24
Updated:2021-03-29
Summary:A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to overwrite arbitrary files in the underlying file system. This vulnerability is due to insufficient validation of the parameters of a specific CLI command. An attacker could exploit this vulnerability by issuing that command with specific parameters. A successful exploit could allow the attacker to overwrite the content of any arbitrary file that resides on the underlying host file system.
CVSS v3 Severity:6.0 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): High
4.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N)
3.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:6.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): Complete
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-552
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-1434

Source: XF
Type: UNKNOWN
cisco-cve20211434-sec-bypass(198701)

Source: CCN
Type: Cisco Security Advisory cisco-sa-iosxe-arbfile-FUxskKDE
Cisco IOS XE SD-WAN Software Arbitrary File Corruption Vulnerability

Source: CISCO
Type: Vendor Advisory
20210324 Cisco IOS XE SD-WAN Software Arbitrary File Corruption Vulnerability

Vulnerable Configuration:Configuration 1:
  • 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:16.12.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1za:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    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 16.12.1
    cisco ios xe 16.12.1a
    cisco ios xe 16.12.1c
    cisco ios xe 16.12.1s
    cisco ios xe 16.12.1t
    cisco ios xe 16.12.1w
    cisco ios xe 16.12.1x
    cisco ios xe 16.12.1y
    cisco ios xe 16.12.1z
    cisco ios xe 16.12.1za
    cisco ios xe 16.12.2
    cisco ios xe 16.12.2a
    cisco ios xe 16.12.2s
    cisco ios xe 16.12.2t
    cisco ios xe 16.12.3
    cisco ios xe 16.12.3a
    cisco ios xe 16.12.3s
    cisco ios xe 17.2.1
    cisco ios xe 17.2.1a
    cisco ios xe 17.2.1r
    cisco ios xe 17.2.1v