CVE-2020-17437
Contiki uIP TCP Urgent Pointer Off-By-Stack Vulnerability
Description
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.
INFO
Published Date :
Dec. 11, 2020, 11:15 p.m.
Last Modified :
Aug. 8, 2022, 2:57 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.2
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2020-17437
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-2020-17437.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf | Patch 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-2020-17437 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-17437 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]
Aug. 08, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:open-iscsi_project:open-iscsi:*:*:*:*:*:*:*:* versions up to (including) 2.1.12 OR *cpe:2.3:a:open-iscsi_project:open-iscsi:*:*:*:*:*:*:*:* versions up to (including) 2.1.7 -
Modified Analysis by [email protected]
Aug. 06, 2022
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf Patch, Third Party Advisory Changed CPE Configuration AND OR *cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:* OR cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:* AND OR *cpe:2.3:a:uip_project:uip:*:*:*:*:*:*:*:* versions up to (including) 1.0 OR cpe:2.3:o:contiki-os:contiki:*:*:*:*:*:*:*:* versions up to (including) 3.0 Added CPE Configuration OR *cpe:2.3:a:open-iscsi_project:open-iscsi:*:*:*:*:*:*:*:* versions up to (including) 2.1.12 Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_3va_com100_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.4.1 OR cpe:2.3:h:siemens:sentron_3va_com100:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_3va_com800_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.4.1 OR cpe:2.3:h:siemens:sentron_3va_com800:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_3va_dsp800_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0 OR cpe:2.3:h:siemens:sentron_3va_dsp800:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_pac2200_clp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:sentron_pac2200_clp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_pac2200_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.2.2 OR cpe:2.3:h:siemens:sentron_pac2200:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_pac3200_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.7 OR cpe:2.3:h:siemens:sentron_pac3200:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_pac3200t_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.2.2 OR cpe:2.3:h:siemens:sentron_pac3200t:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_pac3220_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.2.0 OR cpe:2.3:h:siemens:sentron_pac3220:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:sentron_pac4200_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.3.0 OR cpe:2.3:h:siemens:sentron_pac4200:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 09, 2021
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 15, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H 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-787 Added CPE Configuration AND OR *cpe:2.3:a:uip_project:uip:1.0:*:*:*:*:*:*:* OR cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-17437 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-2020-17437
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.17 }} -0.00%
score
0.53957
percentile