CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0CVE-2020-24335
https://notcve.org/view.php?id=CVE-2020-24335
An issue was discovered in uIP through 1.0, as used in Contiki and Contiki-NG. Domain name parsing lacks bounds checks, allowing an attacker to corrupt memory with crafted DNS packets. Se detectó un problema en uIP versiones hasta 1.0, como es usado en Contiki y Contiki-NG. El análisis de nombres de dominio carece de controles de límites, permitiendo a un atacante corromper la memoria con paquetes DNS diseñados • https://github.com/adamdunkels/uip https://github.com/contiki-ng/contiki-ng https://github.com/contiki-os/contiki https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 https://www.kb.cert.org/vuls/id/815128 • CWE-125: Out-of-bounds Read •
CVSS: 8.2EPSS: 0%CPEs: 3EXPL: 0CVE-2020-24334
https://notcve.org/view.php?id=CVE-2020-24334
The code that processes DNS responses in uIP through 1.0, as used in Contiki and Contiki-NG, does not check whether the number of responses specified in the DNS packet header corresponds to the response data available in the DNS packet, leading to an out-of-bounds read and Denial-of-Service in resolv.c. El código que procesa las respuestas DNS en uIP versiones hasta 1.0, como es usado en Contiki y Contiki-NG, no verifica si el número de respuestas especificadas en el encabezado del paquete DNS corresponde a los datos de respuesta disponibles en el paquete DNS, lo que conlleva a una lectura fuera de límites y una Denegación de Servicio en el archivo resolv.c • https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 https://www.kb.cert.org/vuls/id/815128 • CWE-125: Out-of-bounds Read •
CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2020-17440
https://notcve.org/view.php?id=CVE-2020-17440
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming DNS packets does not validate that domain names present in the DNS responses have '\0' termination. This results in errors when calculating the offset of the pointer that jumps over domain name bytes in DNS response packets when a name lacks this termination, and eventually leads to dereferencing the pointer at an invalid/arbitrary address, within newdata() and parse_name() in resolv.c. Se detectó un problema en uIP versión 1.0, como es usado en Contiki versión 3.0 y otros productos. El código que analiza los paquetes DNS entrantes no comprueba a los nombres de dominio presentes en las respuestas DNS tener terminación "\0". • https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 https://www.kb.cert.org/vuls/id/815128 •
CVSS: 8.3EPSS: 0%CPEs: 2EXPL: 0CVE-2020-17439
https://notcve.org/view.php?id=CVE-2020-17439
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming DNS packets does not validate that the incoming DNS replies match outgoing DNS queries in newdata() in resolv.c. Also, arbitrary DNS replies are parsed if there was any outgoing DNS query with a transaction ID that matches the transaction ID of an incoming reply. Provided that the default DNS cache is quite small (only four records) and that the transaction ID has a very limited set of values that is quite easy to guess, this can lead to DNS cache poisoning. Se detectó un problema en uIP versión 1.0, como es usado en Contiki versión 3.0 y otros productos. • https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 https://www.kb.cert.org/vuls/id/815128 • CWE-20: Improper Input Validation •
CVSS: 9.8EPSS: 0%CPEs: 2EXPL: 0CVE-2020-17438
https://notcve.org/view.php?id=CVE-2020-17438
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that reassembles fragmented packets fails to properly validate the total length of an incoming packet specified in its IP header, as well as the fragmentation offset value specified in the IP header. By crafting a packet with specific values of the IP header length and the fragmentation offset, attackers can write into the .bss section of the program (past the statically allocated buffer that is used for storing the fragmented data) and cause a denial of service in uip_reass() in uip.c, or possibly execute arbitrary code on some target architectures. Se detectó un problema en uIP versión 1.0, como es usado en Contiki versión 3.0 y otros productos. El código que reensambla los paquetes fragmentados no comprueba correctamente la longitud total de un paquete entrante especificado en su encabezado IP, así como el valor de compensación de fragmentación especificado en el encabezado IP. • https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 https://www.kb.cert.org/vuls/id/815128 • CWE-787: Out-of-bounds Write •