Vulnerability CVE-2021-39685

Vulnerability Name:

CVE-2021-39685 (CCN-215354)

Assigned:

2021-12-15

Published:

2021-12-15

Updated:

2022-03-23

Summary:

In various setup methods of the USB gadget subsystem, there is a possible out of bounds write due to an incorrect flag check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-210292376References: Upstream kernel

CVSS v3 Severity:

7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.0 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)

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): High Integrity (I): High Availibility (A): High

7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.0 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)

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): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)

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

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

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-787

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2021-39685

Source: XF
Type: UNKNOWN
linux-kernel-cve202139685-code-exec(215354)

Source: CCN
Type: GITHub Web site
inspector-gadget

Source: CCN
Type: oss-sec Mailing List, Wed, 15 Dec 2021 22:22:33 +0100
CVE-2021-39685 : Linux Kernel USB Gadget buffer overflow

Source: MISC
Type: Patch, Vendor Advisory
https://source.android.com/security/bulletin/2022-03-01

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

Vulnerable Configuration:

Configuration 1:

cpe:/o:google:android:-:*:*:*:*:*:*:*

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:3453	P	clamav-0.101.3-1.19 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3567	P	libXtst6-1.2.2-7.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3398	P	wpa_supplicant-2.6-15.10.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3448	P	busybox-1.21.1-3.3 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:95083	P	kernel-azure-5.14.21-150400.12.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:94590	P	kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:2960	P	kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:95197	P	kernel-default-extra-5.14.21-150400.22.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:95028	P	kernel-docs-5.14.21-150400.22.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:95078	P	reiserfs-kmp-default-5.14.21-150400.22.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:102157	P	Security update for the Linux RT Kernel (Critical)	2022-02-21
oval:org.opensuse.security:def:1600	P	Security update for the Linux RT Kernel (Critical)	2022-02-21
oval:org.opensuse.security:def:42343	P	Security update for the Linux RT Kernel (Critical)	2022-02-21
oval:org.opensuse.security:def:1812	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:938	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:101851	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:99210	P	(Critical)	2022-02-11
oval:org.opensuse.security:def:100414	P	(Critical)	2022-02-11
oval:org.opensuse.security:def:1189	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:101894	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:99484	P	(Critical)	2022-02-11
oval:org.opensuse.security:def:102310	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:100748	P	(Critical)	2022-02-11
oval:org.opensuse.security:def:1241	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:101998	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:99746	P	(Critical)	2022-02-11
oval:org.opensuse.security:def:42337	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:1758	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:102356	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:101630	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:1418	P	Security update for the Linux Kernel (Critical)	2022-02-11
oval:org.opensuse.security:def:100076	P	(Critical)	2022-02-11
oval:org.opensuse.security:def:1563	P	Security update for the Linux Kernel (Critical)	2022-02-10
oval:org.opensuse.security:def:102124	P	Security update for the Linux Kernel (Critical)	2022-02-10

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