Uip
CVE-2020-17437
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Write vulnerability could allow attackers to write data beyond allocated buffer boundaries leading to code execution or crashes.
Technical ContextAI
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. 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. Affected products include: Uip Project Uip, Open-Iscsi Project Open-Iscsi, Siemens Sentron 3Va Com100 Firmware, Siemens Sentron 3Va Com800 Firmware, Siemens Sentron 3Va Dsp800 Firmware.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. Rated critical severity (CVSS 9.8), this
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. Rated high severity (CVSS 8.3), this vuln
The code that processes DNS responses in uIP through 1.0, as used in Contiki and Contiki-NG, does not check whether the
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. Rated high severity (CVSS 7.5), this vuln
An issue was discovered in Contiki through 3.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitab
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
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