What is CVE-2021-42056?

CVE-2021-42056 is a medium-severity vulnerability in Linux Kernel, classified under Improper Link Resolution Before File Access. CVSS score: 6.7/10. Published 2022-06-24.

How severe is CVE-2021-42056?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Is CVE-2021-42056 known to be exploited?

10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2021-42056

Thales Safenet Authentication Client (SAC) for Linux and Windows through 10.7.7 creates insecure temporary hid and lock files allowing a local attacker, through a symlink attack, to overwrite arbitrary files, and potentially achieve arbitrary command execution with high privileges.

EPSS: 0.010 (60.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux Linux_kernel
Microsoft Windows
Thalesgroup Safenet_authentication_client
N/a — versions n/a

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42056?: CVE-2021-42056 is a medium-severity vulnerability in Linux Kernel, classified under Improper Link Resolution Before File Access. CVSS score: 6.7/10. Published 2022-06-24.
How severe is CVE-2021-42056?: Medium severity. CVSS v3 base score is 6.7 out of 10.
Is CVE-2021-42056 known to be exploited?: 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.