Vulnerability CVE-2022-21505

Vulnerability Name:

CVE-2022-21505 (CCN-231490)

Assigned:

2021-11-15

Published:

2022-07-19

Updated:

2022-07-19

Summary:

Linux Kernel could allow a local authenticated attacker to bypass security restrictions, caused by a flaw when Secure Boot is disabled or unavailable. By sending a specially-crafted request to add ima_appraise=log to the kernel command line, an attacker could exploit this vulnerability to bypass the Lockdown protection feature.

CVSS v3 Severity:

5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
4.9 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): High Availibility (A): None

CVSS v2 Severity:

4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): Complete Availibility (A): None

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2022-21505

Source: XF
Type: UNKNOWN
linux-kernel-cve202221505-sec-bypass(231490)

Source: CCN
Type: Linux Kernel Web site
The Linux Kernel Archives

Source: CCN
Type: oss-sec Mailing List, Tue, 19 Jul 2022 17:02:12 +0000
CVE-2022-21505: Kernel lockdown bypass bug

Vulnerable Configuration:

Configuration CCN 1:

cpe:/o:linux:linux_kernel:-:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:8029	P	kernel-docs-5.14.21-150500.53.2 on GA media (Moderate)	2023-06-20
oval:org.opensuse.security:def:8090	P	reiserfs-kmp-default-5.14.21-150500.53.2 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:7539	P	kernel-64kb-5.14.21-150500.53.2 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:707	P	Security update for the Linux Kernel (Important)	2022-08-23
oval:org.opensuse.security:def:118235	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:119287	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:118655	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:119468	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:118792	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:119653	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:118982	P	Security update for the Linux Kernel (Important)	2022-08-15
oval:org.opensuse.security:def:692	P	Security update for the Linux Kernel (Important)	2022-08-12
oval:org.opensuse.security:def:687	P	Security update for the Linux Kernel (Important)	2022-08-09

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