Exploitation Summary
EIP tracks 2 public exploits for CVE-2019-18276. PoCs published by M-ensimag, SABI-Ensimag.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2019-18276, leveraging a local privilege escalation (LPE) vulnerability in Bash's 'enable' command. The exploit uses a shared library with a constructor to escalate privileges and read a restricted file.
Description
An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.
Exploits (2)
This repository contains a functional exploit for CVE-2019-18276, leveraging a local privilege escalation (LPE) vulnerability in Bash's 'enable' command. The exploit uses a shared library with a constructor to escalate privileges and read a restricted file.
This repository contains a functional exploit for CVE-2019-18276, a privilege escalation vulnerability in Bash 5.0. The exploit leverages a SUID binary to drop privileges and execute arbitrary code with elevated permissions.
References (7)
Scores
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H