Vulnerability Name:

CVE-2019-1756 (CCN-158771)

Assigned:2018-12-06
Published:2019-03-27
Updated:2019-10-09
Summary:A vulnerability in Cisco IOS XE Software could allow an authenticated, remote attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying a username with a malicious payload in the web UI and subsequently making a request to a specific endpoint in the web UI. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.
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
7.2 High (CCN 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 (CCN 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
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
9.0 High (CCN 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
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-20
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2019-1756

Source: BID
Type: Third Party Advisory, VDB Entry
107598

Source: XF
Type: UNKNOWN
cisco-cve20191756-cmd-exec(158771)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20190327-iosxe-cmdinject
Cisco IOS XE Software Command Injection Vulnerability

Source: CISCO
Type: Patch, Vendor Advisory
20190327 Cisco IOS XE Software Command Injection Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios:11.0(20.3):*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:cisco:ios:16.9(1):*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.2.0ja:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.7.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.7.1b:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.7.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.7.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1b:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1d:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1e:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.8.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios 11.0(20.3)
    cisco ios 16.9(1)
    cisco ios xe 3.2.0ja
    cisco ios xe 16.7.1
    cisco ios xe 16.7.1a
    cisco ios xe 16.7.1b
    cisco ios xe 16.7.2
    cisco ios xe 16.7.3
    cisco ios xe 16.8.1
    cisco ios xe 16.8.1a
    cisco ios xe 16.8.1b
    cisco ios xe 16.8.1c
    cisco ios xe 16.8.1d
    cisco ios xe 16.8.1e
    cisco ios xe 16.8.1s
    cisco ios xe 16.8.2