CVE-2019-19882

shadow 4.8, in certain circumstances affecting at least Gentoo, Arch Linux, and Void Linux, allows local users to obtain root access because setuid programs are misconfigured. Specifically, this affects shadow 4.8 when compiled using --with-libpam but without explicitly passing --disable-account-tools-setuid, and without a PAM configuration suitable for use with setuid account management tools. This combination leads to account management tools (groupadd, groupdel, groupmod, useradd, userdel, usermod) that can easily be used by unprivileged local users to escalate privileges to root in multiple ways. This issue became much more relevant in approximately December 2019 when an unrelated bug was fixed (i.e., the chmod calls to suidusbins were fixed in the upstream Makefile which is now included in the release version 4.8).

CVSS v3.0 7.8 HIGH
CVSS v2.0 6.9 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.9^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://bugs.archlinux.org/task/64836	Exploit Third Party Advisory
https://github.com/shadow-maint/shadow/pull/199	Patch Third Party Advisory
https://github.com/void-linux/void-packages/pull/17580	Patch Third Party Advisory
https://bugs.gentoo.org/702252	Exploit Third Party Advisory
https://github.com/shadow-maint/shadow/commit/edf7547ad5aa650be868cf2dac58944773c12d75	Patch Third Party Advisory
https://security.gentoo.org/glsa/202008-09

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Configurations

Configuration 1 (hide)

cpe:2.3:a:shadow_project:shadow:4.8:*:*:*:*:*:*:*

Information

Published : 2019-12-18 08:15

Updated : 2020-08-25 08:15

NVD link : CVE-2019-19882

Mitre link : CVE-2019-19882

JSON object : View

CWE

CWE-732

Incorrect Permission Assignment for Critical Resource

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Products Affected

shadow_project

shadow

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