CVE-2017-3224

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Summary

CVECVE-2017-3224
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-07-24 15:29:00 UTC
Updated2019-10-09 23:27:00 UTC
DescriptionOpen Shortest Path First (OSPF) protocol implementations may improperly determine Link State Advertisement (LSA) recency for LSAs with MaxSequenceNumber. According to RFC 2328 section 13.1, for two instances of the same LSA, recency is determined by first comparing sequence numbers, then checksums, and finally MaxAge. In a case where the sequence numbers are the same, the LSA with the larger checksum is considered more recent, and will not be flushed from the Link State Database (LSDB). Since the RFC does not explicitly state that the values of links carried by a LSA must be the same when prematurely aging a self-originating LSA with MaxSequenceNumber, it is possible in vulnerable OSPF implementations for an attacker to craft a LSA with MaxSequenceNumber and invalid links that will result in a larger checksum and thus a 'newer' LSA that will not be flushed from the LSDB. Propagation of the crafted LSA can result in the erasure or alteration of the routing tables of routers within the routing domain, creating a denial of service condition or the re-routing of traffic on the network. CVE-2017-3224 has been reserved for Quagga and downstream implementations (SUSE, openSUSE, and Red Hat packages).

Risk And Classification

Problem Types: CWE-345

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Quagga Quagga - All All All
Application Quagga Quagga - All All All
Application Redhat Package Manager - All All All
Application Redhat Package Manager - All All All
Operating System Suse Opensuse - All All All
Operating System Suse Opensuse - All All All
Operating System Suse Suse Linux - All All All
Operating System Suse Suse Linux - All All All

References

ReferenceSourceLinkTags
Vulnerability Note VU#793496 - Open Shortest Path First (OSPF) protocol implementations may improperly determine LSA recency CERT-VN www.kb.cert.org Third Party Advisory, US Government Resource
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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