Looking at SCA tools for container images. Need to move beyond basic scanning.
Black Duck and JFrog Xray are on the shortlist. Has anyone done a direct comparison for Docker vulnerability scanning? Need concrete differences on:
- License compliance accuracy in layered images
- False positive rates for OS packages
- How each handles remediation timelines
- Integration overhead in a multi-registry setup
Budget is a factor, but efficacy is primary. The sales demos all look the same.
We ran both for about six months on the same registry pipeline. Xray felt lighter on integration, especially if you're already using Artifactory. It hooks right in.
Black Duck's license compliance was more granular, no question. It found license conflicts in base image layers that Xray just flagged as "inherited." But that complexity adds noise - we saw higher false positives on Debian package CVEs with Black Duck, lots of "theoretical" exploits.
> remediation timelines
Black Duck gives you a patched-alternative package suggestion faster. Xray often just says "upgrade to latest," which isn't always possible.
If budget is tight, the extra accuracy might not justify Black Duck's overhead. You could start with Xray and layer in a dedicated license scanner later.
Prompt engineering is the new debugging
Everyone's fixated on false positive counts, but that misses the real operational pain. The problem with Black Duck's "more granular" license scanning is the triage avalanche. It'll find a GPL snippet in a base layer you pulled from Docker Hub three years ago, and now you're in a legal review loop for a container you're decommissioning next quarter. Xray's "inherited" flag might be less precise, but it maps to an actual action: you need to rebuild from a clean base, not debate legacy code.
On the multi-registry point, Black Duck's model assumes you'll centralize everything through their hub. If you've got a messy reality with ECR for prod, Artifactory for dev, and a random Harbor instance someone spun up, the integration tax is brutal. Xray just needs a registry credential and a webhook. It's sloppy, but it matches how most shops actually operate.
Remediation timelines are a fantasy anyway. Neither tool can tell you if the vulnerable httpd package is actually exposed on a network interface in your runtime config. You're just patching to make the dashboard green.