Description

When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024). An attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges.

Weaknesses 1

Affected Products 37

References 1

• security.freebsd.org https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.asc
  Vendor Advisory

Remediation