Vulnerabilities (CVE)

Filtered by vendor Contiki-os Subscribe
Total 22 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-40523 1 Contiki-os 1 Contiki 2021-09-10 5.0 MEDIUM 7.5 HIGH
In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception condition, which leads to property violations and denial of service. Specifically, a server sometimes sends no response, because a fixed buffer space is available for all responses and that space may have been exhausted.
CVE-2021-38387 1 Contiki-os 1 Contiki 2021-08-17 5.0 MEDIUM 7.5 HIGH
In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.
CVE-2021-38386 1 Contiki-os 1 Contiki 2021-08-17 5.0 MEDIUM 7.5 HIGH
In Contiki 3.0, a buffer overflow in the Telnet service allows remote attackers to cause a denial of service because the ls command is mishandled when a directory has many files with long names.
CVE-2021-38311 1 Contiki-os 1 Contiki 2021-08-17 4.3 MEDIUM 7.5 HIGH
In Contiki 3.0, potential nonterminating acknowledgment loops exist in the Telnet service. When the negotiated options are already disabled, servers still respond to DONT and WONT requests with WONT or DONT commands, which may lead to infinite acknowledgment loops, denial of service, and excessive CPU consumption.
CVE-2019-9183 2 Contiki-ng, Contiki-os 2 Contiki-ng, Contiki 2021-07-21 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.
CVE-2020-13985 1 Contiki-os 1 Contiki 2021-07-21 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Contiki through 3.0. A memory corruption vulnerability exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.
CVE-2021-28362 1 Contiki-os 1 Contiki 2021-03-26 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Contiki through 3.0. When sending an ICMPv6 error message because of invalid extension header options in an incoming IPv6 packet, there is an attempt to remove the RPL extension headers. Because the packet length and the extension header length are unchecked (with respect to the available data) at this stage, and these variables are susceptible to integer underflow, it is possible to construct an invalid extension header that will cause memory corruption issues and lead to a Denial-of-Service condition. This is related to rpl-ext-header.c.
CVE-2020-17437 2 Contiki-os, Uip Project 2 Contiki, Uip 2021-03-09 6.4 MEDIUM 8.2 HIGH
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.
CVE-2020-13987 1 Contiki-os 1 Contiki 2021-03-09 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component when calculating the checksums for IP packets in upper_layer_chksum in net/ipv4/uip.c.
CVE-2020-24335 3 Contiki-ng, Contiki-os, Uip Project 3 Contiki-ng, Contiki, Uip 2021-02-04 5.0 MEDIUM 7.5 HIGH
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.
CVE-2020-13986 1 Contiki-os 1 Contiki 2020-12-16 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.
CVE-2020-17438 2 Contiki-os, Uip Project 2 Contiki, Uip 2020-12-15 7.5 HIGH 9.8 CRITICAL
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.
CVE-2020-17439 2 Contiki-os, Uip Project 2 Contiki, Uip 2020-12-15 7.5 HIGH 8.3 HIGH
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.
CVE-2020-17440 2 Contiki-os, Uip Project 2 Contiki, Uip 2020-12-15 5.0 MEDIUM 7.5 HIGH
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.
CVE-2020-24334 3 Contiki-ng, Contiki-os, Uip Project 3 Contiki-ng, Contiki, Uip 2020-12-15 6.4 MEDIUM 8.2 HIGH
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.
CVE-2020-24336 2 Contiki-ng, Contiki-os 2 Contiki-ng, Contiki 2020-12-15 7.5 HIGH 9.8 CRITICAL
An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify whether the address in the answer's length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled.
CVE-2020-25111 1 Contiki-os 1 Contiki-os 2020-12-15 7.5 HIGH 9.8 CRITICAL
An issue was discovered in the IPv6 stack in Contiki through 3.0. There is an insufficient check for the IPv6 header length. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.
CVE-2020-25112 1 Contiki-os 1 Contiki-os 2020-12-14 7.5 HIGH 9.8 CRITICAL
An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.
CVE-2020-13984 1 Contiki-os 1 Contiki 2020-12-14 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when processing IPv6 extension headers in ext_hdr_options_process in net/ipv6/uip6.c.
CVE-2019-8359 2 Contiki-ng, Contiki-os 2 Contiki-ng, Contiki 2020-05-01 7.5 HIGH 9.8 CRITICAL
An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. An out of bounds write is present in the data section during 6LoWPAN fragment re-assembly in the face of forged fragment offsets in os/net/ipv6/sicslowpan.c.