Vulnerability Details : CVE-2020-17437
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-17437
- cpe:2.3:o:siemens:sentron_3va_com100_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_3va_com800_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_3va_dsp800_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_pac2200_clp_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_pac2200_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_pac3200_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_pac3200t_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_pac3220_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sentron_pac4200_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:open-iscsi_project:open-iscsi:*:*:*:*:*:*:*:*
- cpe:2.3:a:uip_project:uip:*:*:*:*:*:*:*:*When used together with: Contiki-os » Contiki
Exploit prediction scoring system (EPSS) score for CVE-2020-17437
0.17%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-17437
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:P |
10.0
|
4.9
|
NIST | |
|
8.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
3.9
|
4.2
|
NIST |
CWE ids for CVE-2020-17437
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-17437
-
https://www.kb.cert.org/vuls/id/815128
VU#815128 - Embedded TCP/IP stacks have memory corruption vulnerabilitiesThird Party Advisory;US Government Resource
-
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
Multiple Embedded TCP/IP Stacks | CISAThird Party Advisory;US Government Resource
-
https://cert-portal.siemens.com/productcert/pdf/ssa-541018.pdf
Patch;Third Party Advisory
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