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ubuntucveUbuntu.comUB:CVE-2019-20044
HistoryFeb 24, 2020 - 12:00 a.m.

CVE-2019-20044

2020-02-2400:00:00
ubuntu.com
ubuntu.com
10

7.8 High

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

7.2 High

CVSS2

Access Vector

LOCAL

Access 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

0.0005 Low

EPSS

Percentile

15.7%

JSON

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.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchzsh< 5.4.2-3ubuntu3.2UNKNOWN
ubuntu22.04noarchzsh< anyUNKNOWN
ubuntu16.04noarchzsh< 5.1.1-1ubuntu2.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

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7.8 High

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

7.2 High

CVSS2

Access Vector

LOCAL

Access 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

0.0005 Low

EPSS

Percentile

15.7%

JSON
Related for UB:CVE-2019-20044
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