What’s Vulnerable › Vulnerabilities

CVE-2017-15865

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-08 · updated 2026-06-17
• Weakness: CWE-200

Description

bgpd 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).

Affected products

• FRRouting: before 2.0.2; 3.0, 3.0-rc0, 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0.1 — fixed in 2.0.2

How to fix

Upgrade to a fixed version: FRRouting 2.0.2. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/101794
• https://frrouting.org/community/security.html
• https://lists.cumulusnetworks.com/pipermail/cumulus-security-announce/2017-November/000009.html
• https://support.cumulusnetworks.com/hc/en-us/articles/115014754307#rn690
• https://support.cumulusnetworks.com/hc/en-us/articles/115014778107-CVE-2017-15865-Malformed-BGP-UPDATE-Triggers-Information-Disclosure
• http://www.securityfocus.com/bid/101794
• https://frrouting.org/community/security.html
• https://lists.cumulusnetworks.com/pipermail/cumulus-security-announce/2017-November/000009.html
• https://support.cumulusnetworks.com/hc/en-us/articles/115014754307#rn690
• https://support.cumulusnetworks.com/hc/en-us/articles/115014778107-CVE-2017-15865-Malformed-BGP-UPDATE-Triggers-Information-Disclosure

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