Vulnerability CVE-2021-29256

Vulnerability Name:

CVE-2021-29256 (CCN-202365)

Assigned:

2021-03-18

Published:

2021-03-18

Updated:

2022-03-22

Summary:

. The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.

CVSS v3 Severity:

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

Exploitability Metrics:	Attack Vector (AV): Network 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

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

Exploitability Metrics:	Attack Vector (AV): Network 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:

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

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

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

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

Vulnerability Type:

CWE-416

Vulnerability Consequences:

Gain Privileges

References:

Source: MITRE
Type: CNA
CVE-2021-29256

Source: CCN
Type: Arm Developer Web site
Mali GPU Kernel Driver allows improper operations on GPU memory

Source: CONFIRM
Type: Vendor Advisory
https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver

Source: XF
Type: UNKNOWN
arm-cve202129256-priv-esc(202365)

Vulnerable Configuration:

Configuration 1:

cpe:/a:arm:bifrost:*:*:*:*:*:*:*:* (Version >= r16p0-01eac0 and < r30p0-01eac0)

OR cpe:/a:arm:midgard:*:*:*:*:*:*:*:* (Version >= r28p0-01eac0 and <= r30p0-01eac0)

OR cpe:/a:arm:valhall:*:*:*:*:*:*:*:* (Version >= r19p0-01eac0 and < r30p0-01eac0)

Denotes that component is vulnerable

BACK