CVE-2020-35684

An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size extracted from the IP header to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller tha...

CVE-2020-35685

An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers ISNs for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing...

CVE-2020-35683

An issue was discovered in HCC Nichestack 3.0. The code that parses ICMP packets relies on an unchecked value of the IP payload size extracted from the IP header to compute the ICMP checksum. When the IP payload size is set to be smaller than the size of the IP header, the ICMP checksum computati...

CVE-2020-35683

An issue was discovered in HCC Nichestack 3.0. The code that parses ICMP packets relies on an unchecked value of the IP payload size extracted from the IP header to compute the ICMP checksum. When the IP payload size is set to be smaller than the size of the IP header, the ICMP checksum computati...

Code injection

An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers ISNs for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing...

Out-of-bounds

An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd:tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet...

Design/Logic Flaw

An issue was discovered in HCC Nichestack 3.0. The code that parses ICMP packets relies on an unchecked value of the IP payload size extracted from the IP header to compute the ICMP checksum. When the IP payload size is set to be smaller than the size of the IP header, the ICMP checksum computati...

Design/Logic Flaw

An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size extracted from the IP header to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller tha...

CVE-2021-31401

CVE-2021-31401 affects HCC Embedded’s InterNiche/NicheStack TCP/IP stack (InterNiche 4.0.1). The issue is an improper input validation in TCP/IP processing: the TCP/IP stack does not validate the IP total length, allowing a crafted IP packet to trigger an integer overflow in tcp_rcv() (nptcp.c). ...

CVE-2020-35685

An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers ISNs for TCP connections derives the ISN from an insufficiently random source. As a result, an attacker may be able to determine the ISN of current and future TCP connections and either hijack existing...

CVE-2020-35685

CVE-2020-35685 affects HCC Nichestack/NicheStack up to versions preceding 4.3, where ISNs are generated from an insufficiently random source. This enables an attacker to potentially hijack existing TCP connections or spoof future ones, as ISN predictability undermines TCP security. The ICS/CISA a...

CVE-2020-35684

An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size extracted from the IP header to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller tha...

CVE-2020-35684

CVE-2020-35684 affects HCC Nichestack (InterNiche/NicheStack) TCP/IP stack. The issue is in the TCP checksum path where the code uses an unchecked IP payload size to compute the TCP payload length, which can cause an out-of-bounds read when the IP payload size is smaller than the IP header. This ...

CVE-2021-31226

An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to lack of size validation. This vulnerability requires the attacker to send a crafted HTTP POST request with a URI longer than 50 bytes. This leads...

CVE-2021-31228

An issue was discovered in HCC embedded InterNiche 4.0.1. This vulnerability allows the attacker to predict a DNS query's source port in order to send forged DNS response packets that will be accepted as valid answers to the DNS client's requests without sniffing the specific request. Data is...

CVE-2021-31400

An issue was discovered in tcppulloutofband in tcpin.c in HCC embedded InterNiche 4.0.1. The TCP out-of-band urgent-data processing function invokes a panic function if the pointer to the end of the out-of-band data points outside of the TCP segment's data. If the panic function hadn't a trap...

CVE-2021-31228

An issue was discovered in HCC embedded InterNiche 4.0.1. This vulnerability allows the attacker to predict a DNS query's source port in order to send forged DNS response packets that will be accepted as valid answers to the DNS client's requests without sniffing the specific request. Data is...

CVE-2021-31227

An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to an incorrect signed integer comparison. This vulnerability requires the attacker to send a malformed HTTP packet with a negative Content-Length,...

Heap overflow

An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to lack of size validation. This vulnerability requires the attacker to send a crafted HTTP POST request with a URI longer than 50 bytes. This leads...

Information disclosure

An issue was discovered in HCC embedded InterNiche 4.0.1. This vulnerability allows the attacker to predict a DNS query's source port in order to send forged DNS response packets that will be accepted as valid answers to the DNS client's requests without sniffing the specific request. Data is...