cve/2016/CVE-2016-4557.md

CVE-2016-4557

Description

The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.

POC

Reference

• https://www.exploit-db.com/exploits/40759/

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/JlSakuya/Linux-Privilege-Escalation-Exploits
• https://github.com/chreniuc/CTF
• https://github.com/dylandreimerink/gobpfld
• https://github.com/kkamagui/linux-kernel-exploits
• https://github.com/meobeongok/kernels
• https://github.com/mudongliang/LinuxFlaw
• https://github.com/oneoy/cve-
• https://github.com/ostrichxyz7/kexps
• https://github.com/s0nk3y/php-kernel-exploit