Description
This module attempts to gain root privileges on Linux systems by abusing a NULL pointer dereference in the `rds_atomic_free_op` function in the Reliable Datagram Sockets (RDS) kernel module (rds.ko).
Successful exploitation requires the RDS kernel module to be loaded. If the RDS module is not blacklisted (default); then it will be loaded automatically.
This exploit supports 64-bit Ubuntu Linux systems, including distributions based on Ubuntu, such as Linux Mint and Zorin OS.
Target offsets are available for:
Ubuntu 16.04 kernels 4.4.0 <= 4.4.0-116-generic; and Ubuntu 16.04 kernels 4.8.0 <= 4.8.0-54-generic.
This exploit does not bypass SMAP. Bypasses for SMEP and KASLR are included. Failed exploitation may crash the kernel.
This module has been tested successfully on various 4.4 and 4.8 kernels.
Module options
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/linux/local/rds/atomic_free_op_null_pointer_deref_priv_escmsf undefined(atomic_free_op_null_pointer_deref_priv_esc) > show actions ...actions...msf undefined(atomic_free_op_null_pointer_deref_priv_esc) > set ACTION < action-name >msf undefined(atomic_free_op_null_pointer_deref_priv_esc) > show options ...show and set options...msf undefined(atomic_free_op_null_pointer_deref_priv_esc) > runPrioritise with Active Threat Intelligence
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