Security Features in pfsense - CVE-2018-20798
Published: March 1, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU36084
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-20798
CWE-ID: CWE-254
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Rubicon Communications
Affected software:
pfsense
pfsense
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
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.
How to mitigate CVE-2018-20798
Install update from vendor's website.