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Files from chompie1337

First Active2020-06-02
Last Active2021-09-01
Linux eBPF ALU32 32-bit Invalid Bounds Tracking Local Privilege Escalation
Posted Sep 1, 2021
Authored by Grant Willcox, chompie1337, Manfred Paul | Site metasploit.com

Linux kernels from 5.7-rc1 prior to 5.13-rc4, 5.12.4, 5.11.21, and 5.10.37 are vulnerable to a bug in the eBPF verifier's verification of ALU32 operations in the scalar32_min_max_and function when performing AND operations, whereby under certain conditions the bounds of a 32 bit register would not be properly updated. This can be abused by attackers to conduct an out of bounds read and write in the Linux kernel and therefore achieve arbitrary code execution as the root user. The target system must be compiled with eBPF support and not have kernel.unprivileged_bpf_disabled set, which prevents unprivileged users from loading eBPF programs into the kernel. Note that if kernel.unprivileged_bpf_disabled is enabled this module can still be utilized to bypass protections such as SELinux, however the user must already be logged as a privileged user such as root.

tags | exploit, arbitrary, kernel, root, code execution
systems | linux
advisories | CVE-2021-3490
SHA-256 | 72309dfd15f65e29e815be3b1add6fc3b2c2baad6cb3b01ac2bbfff15a8b2c9d
Microsoft Windows SMBGhost Remote Code Execution
Posted Jun 2, 2020
Authored by chompie1337

Microsoft Windows SMBGhost pre-authentication remote code execution exploit.

tags | exploit, remote, code execution
systems | windows
advisories | CVE-2020-0796
SHA-256 | ed2ac35e5fce382005bff7d23559c3f72965eed0b632b7eef57568e90b28b4b7
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