Wind River Support Network

HomeDefectsLIN1019-3706
Fixed

LIN1019-3706 : Security Advisory - bash - CVE-2019-18276

Created: Dec 3, 2019    Updated: Apr 22, 2022
Resolved Date: Nov 17, 2021
Found In Version: 10.19.45.1
Fix Version: 10.19.45.20
Severity: Standard
Applicable for: Wind River Linux LTS 19
Component/s: Userspace

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.

CREATE(Triage):(User=admin) CVE-2019-18276 (https://nvd.nist.gov/vuln/detail/CVE-2019-18276)

CVEs


Live chat
Online