Bug 1788452 (CVE-2019-19882) - CVE-2019-19882 shadow-utils: local users can obtain root access because setuid programs are misconfigured
Summary: CVE-2019-19882 shadow-utils: local users can obtain root access because setui...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-19882
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1788454
TreeView+ depends on / blocked
 
Reported: 2020-01-07 09:29 UTC by Marian Rehak
Modified: 2021-02-16 20:48 UTC (History)
12 users (show)

Fixed In Version:
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A flaw was found in shadow-utils. When compiled with --with-libpam, but without explicitly passing --disable-account-tools-setuid and suitable PAM configurations, a local user could obtain root access due to setuid being misconfigured. The highest threat from this vulnerability is to file confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2020-01-07 12:52:18 UTC
Embargoed:

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Description Marian Rehak 2020-01-07 09:29:05 UTC 
Local users can obtain root access because setuid programs are misconfigured. 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.

Upstream Issue:

https://github.com/shadow-maint/shadow/commit/edf7547ad5aa650be868cf2dac58944773c12d75
Comment 1 Tomas Mraz 2020-01-07 09:31:24 UTC 
We do not compile shadow-utils with --with-libpam option.
Comment 3 Eric Christensen 2020-06-30 14:51:53 UTC 
Statement:

This issue only affects the shadow-utils package when compiled with the "with-libpam" option. The shadow-utils package, as shipped by Red Hat, is not compiled with that option and is therefore not affected by this flaw.
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