CVE-2020-17469
FNET IPv6 Fragment Reassembly Uninitialized Pointer Dereference (Denial-of-Service)
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.
INFO
Published Date :
Dec. 11, 2020, 11:15 p.m.
Last Modified :
Oct. 12, 2023, 6:31 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-17469.
| URL | Resource |
|---|---|
| http://fnet.sourceforge.net/manual/fnet_history.html | Release Notes Third Party Advisory |
| https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 | Third Party Advisory US Government Resource |
| https://www.kb.cert.org/vuls/id/815128 | Third Party Advisory US Government Resource |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-17469 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-17469 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-125 CWE-824 -
Initial Analysis by [email protected]
Dec. 17, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://fnet.sourceforge.net/manual/fnet_history.html No Types Assigned http://fnet.sourceforge.net/manual/fnet_history.html Release Notes, Third Party Advisory Changed Reference Type https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 No Types Assigned https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 Third Party Advisory, US Government Resource Changed Reference Type https://www.kb.cert.org/vuls/id/815128 No Types Assigned https://www.kb.cert.org/vuls/id/815128 Third Party Advisory, US Government Resource Added CWE NIST CWE-125 Added CPE Configuration OR *cpe:2.3:a:fnet_project:fnet:*:*:*:*:*:*:*:* versions up to (including) 4.6.4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-17469 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-17469
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.22 }} -0.01%
score
0.59717
percentile