CVE-2019-20044
High
Description
In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid().
SeverityHigh
CVSS7.8
Exploit probability—
Product
Zsh
PublishedFeb 24, 2020
First seenFeb 24, 2020
How to fix
Update
- zsh zsh5.8 or later
- apple ipados13.5 or later
- apple iphone_os13.5 or later
- apple mac_os_x10.15.5, 10.13.6, 10.14.6 or later
- apple tvos13.4.5 or later
- apple watchos6.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zsh zsh | v < 5.8 | 5.8 |
| fedoraproject fedora | 30, 31 | — |
| debian debian_linux | 8.0, 9.0 | — |
| apple ipados | v < 13.5 | 13.5 |
| apple iphone_os | v < 13.5 | 13.5 |
| apple mac_os_x | v < 10.15.5, 10.13.0 ≤ v < 10.13.6, 10.14.0 ≤ v < 10.14.6, 10.15 ≤ v < 10.15.5, 10.13.6, 10.14.6 | 10.15.5, 10.13.6, 10.14.6 |
| apple tvos | v < 13.4.5 | 13.4.5 |
| apple watchos | v < 6.2.5 | 6.2.5 |
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