CVE-2017-17311
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedSome Huawei Firewall products USG2205BSR V300R001C10SPC600; USG2220BSR V300R001C00; USG5120BSR V300R001C00; USG5150BSR V300R001C00 have a DoS vulnerability in the IPSEC IKEv1 implementations of Huawei Firewall products. Due to improper handling of the malformed messages, an attacker may sent crafted packets to the affected device to exploit these vulnerabilities. Successful exploit the vulnerability could lead to device deny of service.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA denial of service vulnerability exists in the IPSEC IKEv1 implementation of specific Huawei USG firewall products (USG2205BSR, USG2220BSR, USG5120BSR, USG5150BSR). The vulnerability stems from improper handling of malformed IKEv1 packets, allowing an unauthenticated remote attacker to send specially crafted packets that cause the device to crash or become unresponsive.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= v300r001c10spc600= v300r001c00= v300r001c00= v300r001c00CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the USG firewall modelRun 'display device' or check the physical device label to confirm the model is USG2205BSR, USG2220BSR, USG5120BSR, or USG5150BSRAffected if The model matches one of these four affected models
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Check the firmware versionRun 'display version' to obtain the current firmware version numberAffected if The version is v300r001c10spc600 (for USG2205BSR) or v300r001c00 (for USG2220BSR, USG5120BSR, or USG5150BSR)
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Verify IPSEC IKEv1 is configuredRun 'display ipsec sa' and 'display ike peer' to check if any IPSEC SAs or IKE peers are defined. Also run 'display ipsec proposal' to list IPsec proposalsAffected if Any IKE peers or IPSEC security associations are configured, indicating IKEv1 is in use
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Confirm IKEv1 is enabled on the deviceCheck the IPSEC policy or VPN configuration via 'display ipsec policy' and look for references to IKEv1 or ensure the IKE service is runningAffected if IKEv1 is enabled in the IPSEC VPN settings or the IKE service is active
The device is affected if it is a USG2205BSR, USG2220BSR, USG5120BSR, or USG5150BSR running the specific vulnerable firmware version and has IPSEC IKEv1 configured or enabled.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply Huawei firmware patches when available; in the interim, consider restricting IKEv1 traffic at network perimeter or disabling IKEv1 if IKEv2 is supported.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-17311 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2017-17311 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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