CVE-2021-42257

Public Exploit

Description

check_smart before 6.9.1 allows unintended drive access by an unprivileged user because it only checks for a substring match of a device path (the /dev/bus substring and a number), aka an unanchored regular expression.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.12%
Third-Party Advisory openwall.com Third-Party Advisory suse.com Third-Party Advisory claudiokuenzler.com Third-Party Advisory claudiokuenzler.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.claudiokuenzler.com/monitoring-plugins/check_smart.php third party advisory
https://www.claudiokuenzler.com/blog/1068/check_smart-6.9.1-security-fix-release-pseudo-device-path third party advisory
https://bugzilla.suse.com/show_bug.cgi?id=1183057 issue tracking patch exploit third party advisory
http://www.openwall.com/lists/oss-security/2021/10/14/2 mailing list exploit third party advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-42257

Frequently Asked Questions

What is the severity of CVE-2021-42257?
CVE-2021-42257 has been scored as a high severity vulnerability.
How to fix CVE-2021-42257?
To fix CVE-2021-42257, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42257 being actively exploited in the wild?
It is possible that CVE-2021-42257 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.