CVE-2019-10056: suricata-ids suricata Out-of-bounds Write

Vulnerability summary

CVE-2019-10056 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in suricata-ids suricata. EPSS estimates a 1.40% chance of exploitation in the next 30 days, higher than 72.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 28-08-2019
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

An issue was discovered in Suricata 4.1.3. The code mishandles the case of sending a network packet with the right type, such that the function DecodeEthernet in decode-ethernet.c is executed a second time. At this point, the algorithm cuts the first part of the packet and doesn't determine the current length. Specifically, if the packet is exactly 28 long, in the first iteration it subtracts 14 bytes. Then, it is working with a packet length of 14. At this point, the case distinction says it is a valid packet. After that it casts the packet, but this packet has no type, and the program crashes at the type case distinction.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.