CVE-2020-17469
Last modified
CVE-2020-17469 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An 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). EPSS estimates a 2.96% chance of exploitation in the next 30 days.
Description
An 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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Butok | Fnet | <= 4.6.4 |
References
- http://fnet.sourceforge.net/manual/fnet_history.htmlRelease Notes, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource
- http://fnet.sourceforge.net/manual/fnet_history.htmlRelease Notes, Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-17469?
How severe is CVE-2020-17469?
How do I fix CVE-2020-17469?
Are you affected by CVE-2020-17469?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST