Out-of-Bounds Read in Openvswitch (CVE-2017-9264)
Summary
Vulnerability in Openvswitch (CVE-2017-9264). Successful exploitation can lead to full system takeover. Exploitable via extract_l3_ipv6.
Original description
The description as published by the source.
In lib/conntrack.c in the firewall implementation in Open vSwitch (OvS) 2.6.1, there is a buffer over-read while parsing malformed TCP, UDP, and IPv6 packets in the functions extract_l3_ipv6, extract_l4_tcp, and extract_l4_udp that can be triggered remotely.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2017-9264 has been found in Openvswitch.
Attackers can target a specific entry point like extract_l3_ipv6 over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Openvswitch CVE-2017-9264" on the vendor's site.
CVE-2017-9264 (Openvswitch) — CWE-125 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: extract_l3_ipv6 / extract_l4_tcp / extract_l4_udp
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Out-of-bounds read (CWE-125) exists in Openvswitch. Attackers reach the vulnerable code path via extract_l3_ipv6 without authentication.
Check the vendor advisory for the affected versions of Openvswitch. Attack surface: extract_l3_ipv6 / extract_l4_tcp / extract_l4_udp.
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Openvswitch' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Openvswitch' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Openvswitchを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2017-9264 openvswitch Fixed in: 2.8.1+dfsg1-2
References
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- patch mail.openvswitch.org