When a significant vulnerability like Spring4Shell is discovered, how do you determine if you are at risk? Insurance or verification services might require you to run external tests on web properties. These reports often show spurious exposures that may or may not lead to more issues on your website. You must research false-positive reports and inform management whether the item found is acceptable risk.
I’ve seen false positives on external scans due to an open port and associating that port with a known issue even if the service is not run on that port. Whenever you have a pen test or vulnerability scan, know that you can disagree with the findings and explain to the researcher how the item in question is not making you insecure. However, these processes take time away from other security duties, and sometimes we agree with the findings and find workarounds and mitigations as that may be faster than arguing with the auditor.
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