CVEvulnerability

CVE-2019-18276

7.8 HIGH Published 2019-11-28 Modified 2026-10-14 Official page ↗
Status
Modified
Published
2019-11-28
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-273

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.

Affected configurations

• gnu bash (<= 5.0) • gnu bash 5.0 • netapp hci management node • netapp oncommand unified manager (>= 9.5) • netapp solidfire • oracle communications cloud native core policy 1.14.0

Related

Weakness · CWE (1)

  • CWE-273 Improper Check for Dropped Privileges weakness

References