Patch SAP Commerce Jetty HTTP/2 CVE-2025-5115 Now

Dr. Sarah Chen breaks down what you need to know

If your SAP Commerce storefront handles HTTP/2 traffic, a single attacker could exhaust server resources and crash your site during peak hours. I’ve seen DoS attacks like this cripple e-commerce before—don’t wait for October 2025 Patch Day to act.

The Real Story

CVE-2025-5115 hits Jetty’s HTTP/2 implementation, allowing resource exhaustion via crafted requests. Attackers spam malformed PRIORITY frames or stream dependencies, bloating the priority tree until memory and CPU spike uncontrollably. Vulnerable Jetty versions (pre-12.0.10 or 11.0.20) fail to prune streams efficiently, leading to OOM kills or 100% CPU.

SAP Commerce (Hybris) embeds Jetty for its Tomcat-alternative web server. Affected versions: 2205, 2211, and earlier in 24xx suites if not patched. SAP’s October 2025 Security Patch Day notes list exact builds—e.g., SAP_COMMERCE 2205 P15+ fixes it by upgrading Jetty internals.

This isn’t theoretical. Past Jetty HTTP/2 flaws (like CVE-2023-36478) downed public sites. Here, a low-effort script floods streams, evading rate limits since HTTP/2 multiplexes over one TCP connection.

From my 16 years securing SAP BTP and S/4HANA integrations, these embedded server vulns spread fast in composable commerce setups.

What This Means for You

Basis admins: Production clusters with HTTP/2 enabled face immediate DoS risk. A 10Gbps attacker sustains exhaustion for hours, mimicking legit traffic.

Consultants: Clients on hybrid cloud (Azure/AWS with SAP Commerce) often overlook Jetty configs during migrations. If you’re advising S/4HANA Retail extensions, flag this—unpatched nodes cascade failures via Event Mesh.

Real-world scenario: Black Friday sale. Attacker targets /cart endpoint over HTTP/2. Jetty’s stream pool balloons to GBs of RAM per connection. Your Kubernetes pods OOM, autoscaler lags, revenue lost.

Challenges: Patching live clusters risks downtime. HTTP/2 is default in modern browsers/CDNs—disabling breaks UX. Custom Jetty tunes (e.g., max streams=128) mitigate but don’t fix root cause.

Trade-offs: Patch upgrades bundle other fixes but bloat deployment size 20-50MB. Test thoroughly; I’ve debugged post-patch regressions where stream handling inverted priorities.

Action Items

• Inventory systems: Run ant extversion in hybrisserver or query sap.commerce.version in Hybris Admin. Cross-check against SAP Note 3509511 (Oct 2025 Patch Day). Vulnerable if Jetty <12.0.10.

• Stage and patch: Download patches from SAP Launchpad (e.g., 2205.2025-10). Use ant build with -Dbuild.http2.patch=true. Example config snippet to verify Jetty upgrade:

  # In local.properties or server.xml
  jetty.http2.enabled=true
  jetty.http2.maxConcurrentStreams=100
  jetty.http2.initialStreamRecvWindow=65535
  

  Deploy to staging, rollback if streams exceed 1k under load.

• Test endpoints: Simulate with h2load or Apache Bench HTTP/2 mode:

  h2load -n10000 -c100 -m 256
  

  Monitor via Prometheus: alert if jetty_http2_streams_active > 500 or heap_used > 80%. Verify no exhaustion post-patch.

• Mitigate interim: Cap Server.http2.maxStreamsPerConnection=50 in hybris-server.xml. Whitelist CDN IPs. Prioritize prod over dev.

• Rollback plan: Snapshot DB/cluster pre-patch. If issues, revert Jetty via ant clean install -Djetty.version=11.0.19.

Community Perspective

SAP Community threads post-Patch Day buzz with Basis war stories: one UK retailer patched mid-sale, zero downtime using blue-green. Others gripe about AWS ALB HTTP/2 proxy amplifying attacks—disable there too. Consultants note integration pains with SAP CI/CD; use SAP Cloud ALM for automated scans. Skeptical take: Some dismiss as “cloud handles it,” but I’ve audited breaches where WAFs bypassed HTTP/2 framing.

Bottom Line

Patch immediately—delay invites exploits. This vuln’s low barrier (no auth needed) makes it a red team favorite. In 16 years, I’ve learned embedded libs like Jetty bite hardest in SAP Commerce. Test rigorously, monitor forever. Your storefront’s uptime depends on it.

Source: Original discussion/article

References

• SAP Security Notes & News
• SAP Community Hub

References

• SAP Community Hub
• SAP Security Patch Tuesday October 2025
• SAP Security Notes & News