PT-2021-23568 · Unknown · Check Smart

Wolfgang Frisch · Published 2021-10-11 · Updated 2023-11-14 · CVE-2021-42257

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions check smart versions prior to 6.9.1

Description The issue allows unintended drive access by an unprivileged user due to a substring match of a device path, specifically checking for the /dev/bus substring and a number, which is an example of an unanchored regular expression. This can lead to unauthorized access.

Recommendations For versions prior to 6.9.1, update to version 6.9.1 or later to resolve the issue. As a temporary workaround, consider restricting access to the check smart function until a patch is available.

Exploit

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2021-42257

Affected Products

Check Smart

References · 8

• 🔥 https://bugzilla.suse.com/show_bug.cgi?id=1183057 · Exploit
• 🔥 http://openwall.com/lists/oss-security/2021/10/14/2 · Exploit
• https://osv.dev/vulnerability/CVE-2021-42257 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42257 · Security Note
• https://claudiokuenzler.com/blog/1068/check_smart-6.9.1-security-fix-release-pseudo-device-path · Note
• https://claudiokuenzler.com/monitoring-plugins/check_smart.php · Note
• https://t.me/cibsecurity/30370 · Telegram Post
• https://t.me/cvenotify/22302 · Telegram Post