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CVE-2018-0295: A vulnerability in the Border Gateway Protocol (BGP) implementation of Cisco NX-OS Software could allow an...

A vulnerability in the Border Gateway Protocol (BGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the device unexpectedly reloading. The vulnerability is due to incomplete input validation of the BGP update messages. An attacker could exploit this vulnerability by sending a crafted BGP update message to the targeted device. An exploit could allow the attacker to cause the switch to reload unexpectedly. The Cisco implementation of the BGP protocol only accepts incoming BGP traffic from explicitly defined peers. To exploit this vulnerability, an attacker must be able to send the malicious packets over a TCP connection that appears to come from a trusted BGP peer or inject malformed messages into the victim's BGP network. This would require obtaining information about the BGP peers in the affected system's trusted network. The vulnerability may be triggered when the router receives a malformed BGP message from a peer on an existing BGP session. At least one BGP neighbor session must be established for a router to be vulnerable. This vulnerability affects Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules. Cisco Bug IDs: CSCve79599, CSCve87784, CSCve91371, CSCve91387.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2018-0295 can make affected Cisco Nexus switches reload unexpectedly when they process a malformed BGP update. For executives, the main risk is network disruption, not data theft. The exposure is narrower than internet-wide scanning because exploitation requires a trusted-looking BGP peer path or malformed traffic inside the BGP network. Exposure is limited to affected Cisco Nexus devices running NX-OS with BGP enabled and at least one established neighbor session. Risk is highest where BGP peer reachability is broad, poorly segmented, or dependent on third-party peers. Prioritize environments where affected Nexus switches carry production routing or data-center fabric traffic. Treat as urgent for BGP-enabled core infrastructure, but not as broadly exposed unless trusted peer paths are reachable by attackers. Mitigation focus: Identify affected Nexus platforms running NX-OS and BGP.; Check Cisco advisory for fixed NX-OS releases and upgrade guidance.; Limit BGP session reachability to expected trusted peers..

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors
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2Source links

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Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco NX-OS unknownCisco NX-OS unknownListed
Weakness

CWE details

CWE-20

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