Vulnerability Name:

CVE-2018-16055 (CCN-150577)

Assigned:2018-08-28
Published:2018-08-28
Updated:2019-10-03
Summary:An authenticated command injection vulnerability exists in status_interfaces.php via dhcp_relinquish_lease() in pfSense before 2.4.4 due to its passing user input from the $_POST parameters "ifdescr" and "ipv" to a shell without escaping the contents of the variables. This allows an authenticated WebGUI user with privileges for the affected page to execute commands in the context of the root user when submitting a request to relinquish a DHCP lease for an interface which is configured to obtain its address via DHCP.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
8.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low
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-78
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2018-16055

Source: MISC
Type: Third Party Advisory
https://doddsecurity.com/190/command-injection-on-pfsense-firewalls/

Source: XF
Type: UNKNOWN
pfsense-cve201816055-command-exec(150577)

Source: CCN
Type: pfSense-SA-18_08.webgui
Authenticated Arbitrary Code Execution

Source: CONFIRM
Type: Mitigation, Vendor Advisory
https://www.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.asc

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-16055

Vulnerable Configuration:Configuration 1:
  • cpe:/a:netgate:pfsense:*:*:*:*:*:*:*:* (Version < 2.4.4)

    • * Denotes that component is vulnerable
    BACK
    netgate pfsense *