Severity
7.8HIGH
EPSS
49.6%
top 2.20%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedNov 28
Latest updateMay 24
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 objec…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages4 packages
Patches
🔴Vulnerability Details
3📋Vendor Advisories
5Microsoft▶
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 ↗2019-11-12
Red Hat
▶
Debian▶
CVE-2019-18276: bash - An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 ...↗2019