by Kastro
Paper/Archive/CVE-2021-4226

CVE-2021-4226

Unknown RSFirewall! — RSFirewall < 1.1.25 - IP Block Bypass

EPSS 0.5%public exploitCVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (NVD, ADP agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 45.8.458 × 209.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

RSFirewall tries to identify the original IP address by looking at different HTTP headers. A bypass is possible due to the way it is implemented.

Affected

ProductAffectedFixed inSource
RSFirewall!< 1.1.251.1.25CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitwpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352