High severity8.2NVD Advisory· Published Dec 11, 2020· Updated Jun 17, 2026
CVE-2020-17437
CVE-2020-17437
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
28- osv-coords26 versionspkg:rpm/opensuse/open-iscsi&distro=openSUSE%20Tumbleweedpkg:rpm/suse/open-iscsi&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Micro%205.0pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP2pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP3pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/open-iscsi&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/open-iscsi&distro=SUSE%20Manager%20Proxy%204.0pkg:rpm/suse/open-iscsi&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0pkg:rpm/suse/open-iscsi&distro=SUSE%20Manager%20Server%204.0pkg:rpm/suse/open-iscsi&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/open-iscsi&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 2.1.5-80.2+ 25 more
- (no CPE)range: < 2.1.5-80.2
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.1.4-22.14.1
- (no CPE)range: < 2.1.4-22.14.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.873-46.17.2
- (no CPE)range: < 2.0.876-53.34.1
- (no CPE)range: < 2.0.876-12.27.2
- (no CPE)range: < 2.0.876-12.27.2
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-12.27.2
- (no CPE)range: < 2.0.876-12.27.2
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-13.42.1
- (no CPE)range: < 2.0.876-12.27.2
- (no CPE)range: < 2.0.876-12.27.2
Patches
Vulnerability mechanics
References
3- cert-portal.siemens.com/productcert/pdf/ssa-541018.pdfnvdPatchThird Party Advisory
- us-cert.cisa.gov/ics/advisories/icsa-20-343-01nvdThird Party AdvisoryUS Government Resource
- www.kb.cert.org/vuls/id/815128nvdThird Party AdvisoryUS Government Resource
News mentions
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