CVE-2020-17437
First published: Tue Dec 01 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Uip Project Uip | <=1.0 | |
| Contiki-os Contiki | <=3.0 | |
| Open-iscsi Project Open-iscsi | <=2.1.7 | |
| Siemens Sentron 3va Com100 Firmware | <4.4.1 | |
| Siemens Sentron 3va Com100 | ||
| Siemens Sentron 3va Com800 Firmware | <4.4.1 | |
| Siemens Sentron 3va Com800 | ||
| Siemens Sentron 3va Dsp800 Firmware | <4.0 | |
| Siemens Sentron 3va Dsp800 | ||
| Siemens Sentron Pac2200 Clp Firmware | ||
| Siemens Sentron Pac2200 Clp | ||
| Siemens Sentron Pac2200 Firmware | <3.2.2 | |
| Siemens Sentron Pac2200 | ||
| Siemens Sentron Pac3200 Firmware | <2.4.7 | |
| Siemens Sentron Pac3200 | ||
| Siemens Sentron Pac3200t Firmware | <3.2.2 | |
| Siemens Sentron Pac3200t | ||
| Siemens Sentron Pac3220 Firmware | <3.2.0 | |
| Siemens Sentron Pac3220 | ||
| Siemens Sentron Pac4200 Firmware | <2.3.0 | |
| Siemens Sentron Pac4200 | ||
| ubuntu/open-iscsi | <2.1.3-1ubuntu1 | 2.1.3-1ubuntu1 |
| ubuntu/open-iscsi | <2.0.874-7.1ubuntu6.4 | 2.0.874-7.1ubuntu6.4 |
| ubuntu/open-iscsi | <2.1.3-1ubuntu1 | 2.1.3-1ubuntu1 |
| ubuntu/open-iscsi | <2.1.3 | 2.1.3 |
| ubuntu/open-iscsi | <2.0.874-5ubuntu2.11+ | 2.0.874-5ubuntu2.11+ |
| ubuntu/open-iscsi | <2.0.873+ | 2.0.873+ |
| ubuntu/open-iscsi | <2.1.3-1ubuntu1 | 2.1.3-1ubuntu1 |
| ubuntu/open-iscsi | <2.1.3-1ubuntu1 | 2.1.3-1ubuntu1 |
| ubuntu/open-iscsi | <2.1.3-1ubuntu1 | 2.1.3-1ubuntu1 |
| debian/open-iscsi | <=2.0.874-7.1 | 2.1.3-5 2.1.8-1 2.1.9-3 |
| All of | ||
| Uip Project Uip | <=1.0 | |
| Contiki-os Contiki | <=3.0 | |
| All of | ||
| Siemens Sentron 3va Com100 Firmware | <4.4.1 | |
| Siemens Sentron 3va Com100 | ||
| All of | ||
| Siemens Sentron 3va Com800 Firmware | <4.4.1 | |
| Siemens Sentron 3va Com800 | ||
| All of | ||
| Siemens Sentron 3va Dsp800 Firmware | <4.0 | |
| Siemens Sentron 3va Dsp800 | ||
| All of | ||
| Siemens Sentron Pac2200 Clp Firmware | ||
| Siemens Sentron Pac2200 Clp | ||
| All of | ||
| Siemens Sentron Pac2200 Firmware | <3.2.2 | |
| Siemens Sentron Pac2200 | ||
| All of | ||
| Siemens Sentron Pac3200 Firmware | <2.4.7 | |
| Siemens Sentron Pac3200 | ||
| All of | ||
| Siemens Sentron Pac3200t Firmware | <3.2.2 | |
| Siemens Sentron Pac3200t | ||
| All of | ||
| Siemens Sentron Pac3220 Firmware | <3.2.0 | |
| Siemens Sentron Pac3220 | ||
| All of | ||
| Siemens Sentron Pac4200 Firmware | <2.3.0 | |
| Siemens Sentron Pac4200 | ||
| Multiple (open source) picoTCP-NG, Version 1.7.0 and prior | ||
| Multiple (open source) picoTCP (EOL), Version 1.7.0 and prior | ||
| Multiple (open source) FNET, Version 4.6.3 | ||
| Multiple (open source) Nut/Net, Version 5.1 and prior |
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Reference Links
- https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
- https://www.kb.cert.org/vuls/id/815128
- https://launchpad.net/bugs/cve/CVE-2020-17437
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-17437
- https://github.com/open-iscsi/open-iscsi/security/advisories/GHSA-r278-fm99-8rgp
- https://www.forescout.com/company/resources/amnesia33-how-tcp-ip-stacks-breed-critical-vulnerabilities-in-iot-ot-and-it-devices/
- https://ubuntu.com/security/notices/USN-6259-1
- https://nvd.nist.gov/vuln/detail/CVE-2020-17437
- https://security-tracker.debian.org/tracker/CVE-2020-17437
- https://github.com/open-iscsi/open-iscsi/commit/d63ce0d64c5abe9f285f14ce394660bfb9a16538
- https://ubuntu.com/security/CVE-2020-17437
- https://groups.google.com/g/open-iscsi/c/iRS9fcB1bJU/m/BbxY1SGPEwAJ
- https://www.cisa.gov/news-events/ics-advisories/icsa-20-343-01 (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-17437.
What is the severity of CVE-2020-17437?
The severity of CVE-2020-17437 is high with a severity value of 8.2.
Which products are affected by CVE-2020-17437?
Products such as uIP 1.0 in Contiki 3.0 and other related products are affected by CVE-2020-17437.
How can I fix CVE-2020-17437?
To fix CVE-2020-17437, it is recommended to apply the necessary patches or updates provided by the vendor.
Where can I find more information about CVE-2020-17437?
You can find more information about CVE-2020-17437 on the official websites of US-CERT and Siemens, as well as the KB-CERT advisory.
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/usn-cve
- source/Ubuntu
- agent/software-canonical-lookup
- collector/security-tracker-debian
- source/Debian
- collector/nvd-cve
- source/NVD
- agent/weakness
- agent/remedy
- agent/event
- agent/description
- collector/ics-cert-advisory
- source/ICS
- agent/severity
- agent/references
- agent/softwarecombine
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/uip project
- canonical/uip project uip
- version/uip project uip/1.0
- vendor/contiki-os
- canonical/contiki-os contiki
- version/contiki-os contiki/3.0
- vendor/open-iscsi project
- canonical/open-iscsi project open-iscsi
- version/open-iscsi project open-iscsi/2.1.7
- vendor/siemens
- canonical/siemens sentron 3va com100 firmware
- canonical/siemens sentron 3va com100
- canonical/siemens sentron 3va com800 firmware
- canonical/siemens sentron 3va com800
- canonical/siemens sentron 3va dsp800 firmware
- canonical/siemens sentron 3va dsp800
- canonical/siemens sentron pac2200 clp firmware
- canonical/siemens sentron pac2200 clp
- canonical/siemens sentron pac2200 firmware
- canonical/siemens sentron pac2200
- canonical/siemens sentron pac3200 firmware
- canonical/siemens sentron pac3200
- canonical/siemens sentron pac3200t firmware
- canonical/siemens sentron pac3200t
- canonical/siemens sentron pac3220 firmware
- canonical/siemens sentron pac3220
- canonical/siemens sentron pac4200 firmware
- canonical/siemens sentron pac4200
- package-manager/ubuntu
- package-manager/debian
- vendor/multiple (open source)
- canonical/multiple (open source) picotcp-ng, version 1.7.0 and prior
- canonical/multiple (open source) picotcp (eol), version 1.7.0 and prior
- canonical/multiple (open source) fnet, version 4.6.3
- canonical/multiple (open source) nut/net, version 5.1 and prior