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The US Cybersecurity Infrastructure and Security Agency (CISA) has warned of critical vulnerabilities in a low-level TCP/IP software library developed by Treck that, if weaponized, could allow remote attackers to run arbitrary commands and mount denial-of-service (DoS) attacks.

The four flaws affect Treck TCP/IP stack version 6.0.1.67 and earlier and were reported to the company by Intel. Two of these are rated critical in severity.

Treck’s embedded TCP/IP stack is deployed worldwide in manufacturing, information technology, healthcare, and transportation systems.

The most severe of them is a heap-based buffer overflow vulnerability (CVE-2020-25066) in the Treck HTTP Server component that could permit an adversary to crash or reset the target device and even execute remote code. It has a CVSS score of 9.8 out of a maximum of 10.

The second flaw is an out-of-bounds write in the IPv6 component (CVE-2020-27337, CVSS score 9.1) that could be exploited by an unauthenticated user to cause a DoS condition via network access.

Two other vulnerabilities concern an out-of-bounds read in the IPv6 component (CVE-2020-27338, CVSS score 5.9) that could be leveraged by an unauthenticated attacker to cause DoS and an improper input validation in the same module (CVE-2020-27336, CVSS score 3.7) that could result in an out-of-bounds read of up to three bytes via network access.

images from Hacker News