Ubuntu.comUB:CVE-2019-20044CVE-2019-20044
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
17.0%
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().
Bugs
Notes
| Author | Note |
|---|---|
| mdeslaur | reproducer in debian bug low priority since upstream considers this to be a “minor vulnerability” |
| rodrigo-zaiden | affects versions prior to 5.8, so only xenial and bionic needed to be patched. |
Related
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
17.0%