CVE-2021-43395 : An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb

An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb90, OmniOS Community Edition r151038, OpenIndiana Hipster 2021.04, and SmartOS 20210923. A local unprivileged user can cause a deadlock and kernel panic via crafted rename and rmdir calls on tmpfs filesystems. Oracle Solaris 10 and 11 is also affected.

Published 2022-12-26 06:15:11

Updated 2023-01-05 17:26:09

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-43395

Oracle » Solaris » Version: 11
cpe:2.3:o:oracle:solaris:11:*:*:*:*:*:*:*
Matching versions
Oracle » Solaris » Version: 10
cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*
Matching versions
Illumos » Illumos
Versions before (<) 2022-01-18
cpe:2.3:o:illumos:illumos:*:*:*:*:*:*:*:*
Matching versions
Joyent » Smartos » Version: 20210923
cpe:2.3:o:joyent:smartos:20210923:*:*:*:*:*:*:*
Matching versions
Omniosce » Omnios » Version: R151038 Community Edition
cpe:2.3:o:omniosce:omnios:r151038:*:*:*:community:*:*:*
Matching versions
Openindiana » Openindiana » Version: Hipster 2021.04
cpe:2.3:o:openindiana:openindiana:hipster_2021.04:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-43395

EPSS FAQ

0.01%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 1 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-43395

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

References for CVE-2021-43395

https://www.oracle.com/security-alerts/cpujan2022.html

Oracle Critical Patch Update Advisory - January 2022
Patch;Third Party Advisory

CVEs referencing this url
https://illumos.topicbox.com/groups/developer/T1c9e4f27f8c2f959/security-heads-up-illumos14424

SECURITY HEADS UP - illumos#14424 | Topicbox
Vendor Advisory
https://jgardner100.wordpress.com/2022/01/20/security-heads-up/

Security Heads Up | All Things illumos
Third Party Advisory
https://www.illumos.org/issues/14424

Bug #14424: tmpfs can be induced to deadlock - illumos gate - illumos
Issue Tracking;Patch;Vendor Advisory
https://github.com/illumos/illumos-gate/blob/069654420de4aade43c63c43cd2896e66945fc8a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c

Exploit;Third Party Advisory
http://www.tribblix.org/relnotes.html

Tribblix
Release Notes;Third Party Advisory
https://github.com/illumos/illumos-gate/blob/b3403853e80914bd0aade9b5b605da4878078173/usr/src/uts/common/fs/tmpfs/tmp_dir.c

Exploit;Third Party Advisory
https://kebe.com/blog/?p=505

Kebe Says - Dan McD's Blog» A Request to Security Researchers from illumos
Third Party Advisory
https://github.com/illumos/illumos-gate/commit/f859e7171bb5db34321e45585839c6c3200ebb90

14424 tmpfs can be induced to deadlock · illumos/illumos-gate@f859e71 · GitHub
Patch;Third Party Advisory

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Vulnerability Details : CVE-2021-43395

Products affected by CVE-2021-43395

Exploit prediction scoring system (EPSS) score for CVE-2021-43395

CVSS scores for CVE-2021-43395

References for CVE-2021-43395