Vulnerability Name:

CVE-2018-20798 (CCN-158011)

Assigned:2019-03-01
Published:2019-03-01
Updated:2020-08-24
Summary:The expiretable configuration in pfSense 2.4.4_1 establishes block durations that are incompatible with the block durations implemented by sshguard, which might make it easier for attackers to bypass intended access restrictions.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-732
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2018-20798

Source: XF
Type: UNKNOWN
pfsense-cve201820798-sec-bypass(158011)

Source: CCN
Type: pfSence Bug #9223
SHGUARD doesn't work as expected

Source: MISC
Type: Exploit, Issue Tracking, Patch, Vendor Advisory
https://redmine.pfsense.org/issues/9223

Source: CCN
Type: pfSence Web site
World's Most Trusted Open Source Firewall

Vulnerable Configuration:Configuration 1:
  • cpe:/a:netgate:pfsense:2.4.4:p1:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:pfsense:pfsense:2.4.4:p1:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    netgate pfsense 2.4.4 p1
    pfsense pfsense 2.4.4 p1