CVE-2017-15865
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 · uneditedbgpd in FRRouting (FRR) before 2.0.2 and 3.x before 3.0.2, as used in Cumulus Linux before 3.4.3 and other products, allows remote attackers to obtain sensitive information via a malformed BGP UPDATE packet from a connected peer, which triggers transmission of up to a few thousand unintended bytes because of a mishandled attribute length, aka RN-690 (CM-18492).
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 vulnerability in FRRouting's bgpd daemon allows remote attackers to obtain sensitive information via malformed BGP UPDATE packets. The mishandling of attribute length causes the software to transmit up to a few thousand unintended bytes to a connected peer, exposing memory contents or other sensitive data.
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< 2.0.2= 3.0= 3.0.1CVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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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Confirm bgpd daemon is runningRun 'ps aux | grep bgpd' or check your routing process list to verify the bgpd daemon is activeAffected if bgpd is not running, the vulnerability cannot be triggered
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Identify installed FRRouting versionRun 'frr -v' or 'vtysh -c "show version"' to display the FRRouting version numberAffected if version cannot be determined or is not displayed
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Compare version against vulnerable rangeCheck if the installed version is < 2.0.2, or equals 3.0 or 3.0.1Affected if version falls within < 2.0.2, = 3.0, or = 3.0.1, making it vulnerable
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Verify BGP peering is configuredRun 'vtysh -c "show ip bgp summary"' or check BGP neighbor status to confirm active or configured BGP peersAffected if BGP peers exist and the vulnerable version is running, the malformed packet handling can expose memory to those peers
You are affected if bgpd is running with FRRouting version 2.0, 2.0.1, 3.0, or 3.0.1 and has BGP peer connections configured.
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 data2.0.2
Upgrade FRRouting to version 2.0.2/3.0.2 or later, or upgrade affected products like Cumulus Linux to 3.4.3 or later. Until patched, restrict BGP peer connections to trusted sources via ACLs or network segmentation.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 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 $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-15865 — 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-2017-15865 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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