CVE-2020-17469

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Summary

CVECVE-2020-17469
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-12-11 23:15:00 UTC
Updated2023-10-12 18:31:00 UTC
DescriptionAn issue was discovered in FNET through 4.6.4. The code for IPv6 fragment reassembly tries to access a previous fragment starting from a network incoming fragment that still doesn't have a reference to the previous one (which supposedly resides in the reassembly list). When faced with an incoming fragment that belongs to a non-empty fragment list, IPv6 reassembly must check that there are no empty holes between the fragments: this leads to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c, and causes Denial-of-Service.

Risk And Classification

Problem Types: CWE-824

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Butok Fnet All All All All
Application Fnet Project Fnet All All All All

References

ReferenceSourceLinkTags
VU#815128 - Embedded TCP/IP stacks have memory corruption vulnerabilities MISC www.kb.cert.org Third Party Advisory, US Government Resource
fnet.sourceforge.net/manual/fnet_history.html CONFIRM fnet.sourceforge.net Release Notes, Third Party Advisory
Multiple Embedded TCP/IP Stacks | CISA MISC us-cert.cisa.gov 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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