Squid package should be upgraded to v4.9
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Check these CVS which they seem to be fixed on squid v4.9. There it's no 4.4.x (the current version pfSense has) with those fixes.
CVE-2019-12526 - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12526
CVE-2019-18679 - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18679
CVE-2019-18678 - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18678The first and second seem to be high impact.
https://nsfocusglobal.com/advisory-squid-multiple-high-risk-vulnerability/ -
pfSense 2.4.x is still on squid-3.5.27_3. pfSense 2.5.x is on squid-4.9.
The "4.4.x" you are seeing is just the GUI package version and is actually 0.4.44_9, but that's not relevant to squid issues.
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Thanks for the clarification. But squid v3.5 has the same problem and at this moment doesn't has a fix.
The last version of 3.5 branch it's 3.5.28 ant it's affected too.