CVE-2021-20988
Hilscher rcX UDP Length Verification Bypass Denial of Service
Description
In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.
INFO
Published Date :
May 13, 2021, 2:15 p.m.
Last Modified :
Sept. 9, 2021, 12:51 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-20988
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-20988.
| URL | Resource |
|---|---|
| https://cert.vde.com/de-de/advisories/vde-2021-018 | Third Party Advisory |
| https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum | Vendor Advisory |
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-2021-20988 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20988 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 -
Reanalysis by [email protected]
Sep. 09, 2021
Action Type Old Value New Value Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-16di-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-16di-g60l-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-16di-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-16di-g60l-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-16dio-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-16dio-g60l-c1-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-16dio-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-16dio-g60l-c1-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-16dio-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-16dio-g60l-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-16dio-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-16dio-g60l-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8di8do-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8di8do-g60l-c1-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-8di8do-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-8di8do-g60l-c1-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8di8do-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8di8do-g60l-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-8di8do-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-8di8do-g60l-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8iol-g30l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8iol-g30l-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-8iol-g30l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-8iol-g30l-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8iol-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8iol-g60l-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-8iol-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-8iol-g60l-v1d:-:*:*:*:*:*:*:* Changed CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8iol-s2-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8iol-s2-g60l-v1d:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:pepperl-fuchs:ice1-8iol-s2-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperl-fuchs:ice1-8iol-s2-g60l-v1d:-:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
May. 21, 2021
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 https://cert.vde.com/de-de/advisories/vde-2021-018 No Types Assigned https://cert.vde.com/de-de/advisories/vde-2021-018 Third Party Advisory Changed Reference Type https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum No Types Assigned https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum Vendor Advisory Added CWE NIST CWE-119 Added CPE Configuration OR *cpe:2.3:a:hilscher:rcx_rtos:*:*:*:*:*:*:*:* versions up to (excluding) 2.1.14.1 Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-16di-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-16di-g60l-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-16dio-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-16dio-g60l-c1-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-16dio-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-16dio-g60l-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8di8do-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8di8do-g60l-c1-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8di8do-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8di8do-g60l-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8iol-g30l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8iol-g30l-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8iol-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8iol-g60l-v1d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:pepperi-fuchs:ice1-8iol-s2-g60l-v1d_firmware:*:*:*:*:*:*:*:* versions up to (including) f10017 OR cpe:2.3:h:pepperi-fuchs:ice1-8iol-s2-g60l-v1d:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20988 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-2021-20988
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.01%
score
0.45443
percentile