8aa4c175ae
Standalone `docker exec trivy-service trivy image ...` opens the vuln-DB cache the long-lived server already holds, failing with "cache may be in use by another process: timeout" — so every scan silently returned [] (apps: 0 even on vulnerable images). Point the exec'd client at the server (--server http://localhost:4954, the container's fixed --listen port); the server owns the DB, the client just submits the image. Verified against alpine:3.10. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
78 lines
3.8 KiB
Bash
78 lines
3.8 KiB
Bash
#!/bin/bash
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# Trivy CVE scanner integration — probed by the WebUI updater generator.
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# ---------------------------------------------------------------------------
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# Trivy (containers/trivy) runs as a long-lived server whose vulnerability DB
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# is cached in ./trivy-cache. On first start — and periodically after — that DB
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# is downloaded (tens of MB). Until it lands NO scan can produce results, so the
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# WebUI must not paint a green "no known vulnerabilities" all-clear yet.
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#
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# These helpers expose the scanner's state so the updater generator can write an
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# honest cves.json:
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# absent — Trivy isn't installed/running (CVE scanning unavailable)
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# db_updating — installed, but the vulnerability DB is still downloading
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# ready — DB present; real per-image scans can run
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# Every helper degrades to the safe answer (absent / [] ) on any error so the
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# generator never breaks.
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# Echoes: absent | db_updating | ready
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trivyScannerState() {
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# Not in `docker ps` (never installed, stopped, or still starting) -> absent.
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dockerCommandRun "docker ps --format '{{.Names}}'" 2>/dev/null \
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| grep -qx trivy-service || { echo absent; return; }
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# Running: the DB is ready once `trivy version` reports a VulnerabilityDB
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# block (null/absent while it's still being fetched on first boot).
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local ver; ver="$(dockerCommandRun "docker exec trivy-service trivy version -f json" 2>/dev/null)"
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[ -n "$ver" ] || { echo db_updating; return; }
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if command -v jq >/dev/null 2>&1; then
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[ -n "$(printf '%s' "$ver" | jq -r '.VulnerabilityDB // empty' 2>/dev/null)" ] \
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&& echo ready || echo db_updating
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else
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# No jq: DownloadedAt only appears once the DB is present (and, unlike a
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# nullable VulnerabilityDB key, avoids a false positive when it's null).
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printf '%s' "$ver" | grep -q '"DownloadedAt"' \
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&& echo ready || echo db_updating
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fi
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}
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# Echoes the DB's UpdatedAt timestamp (ISO8601) if available, else nothing.
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trivyDbUpdatedAt() {
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command -v jq >/dev/null 2>&1 || return 0
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local ver; ver="$(dockerCommandRun "docker exec trivy-service trivy version -f json" 2>/dev/null)"
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[ -n "$ver" ] || return 0
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printf '%s' "$ver" | jq -r '.VulnerabilityDB.UpdatedAt // empty' 2>/dev/null
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}
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# trivyScanImageCves <image> — scan one image against the cached DB and echo a
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# JSON array of normalized CVE objects for the WebUI:
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# [ { id, severity, package, installed, fixed_in, url }, ... ]
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# Echoes [] on any failure so a single bad image never aborts the whole scan.
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# Requires jq (the generator already guards on it).
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trivyScanImageCves() {
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local image="$1"
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[ -n "$image" ] || { echo '[]'; return; }
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command -v jq >/dev/null 2>&1 || { echo '[]'; return; }
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# Scan in CLIENT mode against the running server (--server localhost:4954,
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# the container's fixed --listen port). Standalone `trivy image` would try to
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# open the vuln-DB cache the server already holds and fail with a cache-lock
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# timeout; client mode leaves the DB to the server. --quiet keeps the
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# progress spinner out of stdout; we only want CRITICAL..LOW findings.
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local raw
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raw="$(dockerCommandRun "docker exec trivy-service trivy image --server http://localhost:4954 --quiet --scanners vuln --format json --severity CRITICAL,HIGH,MEDIUM,LOW '$image'" 2>/dev/null)"
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[ -n "$raw" ] || { echo '[]'; return; }
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printf '%s' "$raw" | jq -c '
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[ (.Results // [])[] | (.Vulnerabilities // [])[] | {
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id: .VulnerabilityID,
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severity: ((.Severity // "UNKNOWN") | ascii_downcase),
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package: .PkgName,
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installed: (.InstalledVersion // ""),
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fixed_in: (.FixedVersion // ""),
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url: (.PrimaryURL // "")
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} ]
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| unique_by(.id + "|" + (.package // ""))
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' 2>/dev/null || echo '[]'
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}
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