CVE-2019-19882

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Summary

CVECVE-2019-19882
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-12-18 16:15:00 UTC
Updated2020-08-25 15:15:00 UTC
Descriptionshadow 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).

Risk And Classification

Problem Types: CWE-732

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Shadow Project Shadow 4.8 All All All
Application Shadow Project Shadow 4.8 All All All

References

ReferenceSourceLinkTags
Shadow: Privilege escalation (GLSA 202008-09) — Gentoo security GENTOO security.gentoo.org
FS#64836 : [shadow] useradd, groupadd, etc. are now setuid-root MISC bugs.archlinux.org Exploit, Third Party Advisory
Fix failing chmod calls on installation for suidubins · shadow-maint/shadow@edf7547 · GitHub MISC github.com Patch, Third Party Advisory
702252 – (CVE-2019-19882) <sys-apps/shadow-4.8-r3[pam] installs setuid binaries with permissive pam configuration allowing user/group management without authentication (CVE-2019-19882) MISC bugs.gentoo.org Exploit, Third Party Advisory
Don't auto-enable ACCT_TOOLS_SETUID if PAM is detected by falconindy · Pull Request #199 · shadow-maint/shadow · GitHub MISC github.com Patch, Third Party Advisory
shadow: reduce the number of suid programs by Duncaen · Pull Request #17580 · void-linux/void-packages · GitHub MISC github.com Patch, Third Party Advisory
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