PT-2018-6614 · Gnu+2 · Gnu Coreutils+2

Michael Orlitzky · Published 2018-01-04 · Updated 2019-01-08 · CVE-2017-18018

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions: GNU Coreutils versions prior to 8.30

Description: The issue allows local users to modify the ownership of arbitrary files by leveraging a race condition when using the POSIX "-R -L" options in chown and chgrp. This occurs because chown-core.c does not prevent replacement of a plain file with a symlink.

Recommendations: For GNU Coreutils versions prior to 8.30, update to version 8.30 or later to resolve the issue. As a temporary workaround, consider avoiding the use of the POSIX "-R -L" options in chown and chgrp until the update is applied.

Exploit

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALT-PU-2018-2970

CVE-2017-18018

ECHO-4077-4868-610E

MGASA-2019-0022

Affected Products

Alt Linux

Debian

Gnu Coreutils

References · 24

• 🔥 http://lists.gnu.org/archive/html/coreutils/2017-12/msg00045.html · Exploit
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/JK2ISMPYUEU3JS3L7AVXEHWCI56INCJJ · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-18018 · Vendor Advisory
• https://errata.altlinux.org/ALT-PU-2018-2970 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-18018 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-18018 · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2017-18018 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2019-0022 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18018 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/4ZP6L5HXDOVKYTM5ELLYE64H75MT4LZR · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-18018 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-18018 · Security Note
• https://advisories.mageia.org/MGASA-2019-0022.html · Security Note
• https://osv.dev/vulnerability/CVE-2017-18018 · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/coreutils · Vendor Advisory