8.6
HIGH
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 :

Nov. 21, 2024, 5:47 a.m.

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.

ID Vendor Product Action
1 Pepperl-fuchs ice1-16di-g60l-v1d_firmware
2 Pepperl-fuchs ice1-16dio-g60l-c1-v1d_firmware
3 Pepperl-fuchs ice1-16dio-g60l-v1d_firmware
4 Pepperl-fuchs ice1-8di8do-g60l-c1-v1d_firmware
5 Pepperl-fuchs ice1-8di8do-g60l-v1d_firmware
6 Pepperl-fuchs ice1-8iol-g30l-v1d_firmware
7 Pepperl-fuchs ice1-8iol-g60l-v1d_firmware
8 Pepperl-fuchs ice1-8iol-s2-g60l-v1d_firmware
9 Pepperl-fuchs ice1-16di-g60l-v1d
10 Pepperl-fuchs ice1-16dio-g60l-c1-v1d
11 Pepperl-fuchs ice1-16dio-g60l-v1d
12 Pepperl-fuchs ice1-8di8do-g60l-c1-v1d
13 Pepperl-fuchs ice1-8di8do-g60l-v1d
14 Pepperl-fuchs ice1-8iol-g30l-v1d
15 Pepperl-fuchs ice1-8iol-g60l-v1d
16 Pepperl-fuchs ice1-8iol-s2-g60l-v1d
1 Hilscher rcx_rtos
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
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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://cert.vde.com/de-de/advisories/vde-2021-018
    Added Reference https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum
  • 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:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.15 }} 0.03%

score

0.51466

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
Confidentiality
Integrity
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