7.5
HIGH
CVE-2021-46755
SysHub ASP Denial of Service Vulnerability
Description

Failure to unmap certain SysHub mappings in error paths of the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious bootloader to exhaust the SysHub resources resulting in a potential denial of service.

INFO

Published Date :

May 9, 2023, 8:15 p.m.

Last Modified :

May 22, 2023, 3:43 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-46755 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Amd ryzen_3100_firmware
2 Amd ryzen_3300x_firmware
3 Amd ryzen_3500_firmware
4 Amd ryzen_3500x_firmware
5 Amd ryzen_3600_firmware
6 Amd ryzen_3600x_firmware
7 Amd ryzen_3600xt_firmware
8 Amd ryzen_3800x_firmware
9 Amd ryzen_3800xt_firmware
10 Amd ryzen_3900_firmware
11 Amd ryzen_3900x_firmware
12 Amd ryzen_3900xt_firmware
13 Amd ryzen_3950x_firmware
14 Amd ryzen_5500_firmware
15 Amd ryzen_5600_firmware
16 Amd ryzen_5600g_firmware
17 Amd ryzen_5600x_firmware
18 Amd ryzen_5700g_firmware
19 Amd ryzen_5700x_firmware
20 Amd ryzen_5800x_firmware
21 Amd ryzen_5800x3d_firmware
22 Amd ryzen_5900x_firmware
23 Amd ryzen_5950x_firmware
: Total Affected Vendor : 1 | Products : 23
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-46755.

URL Resource
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-46755 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-46755 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    May. 22, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 No Types Assigned https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5500_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5500_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5600_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5600:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5600_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5600:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5600g_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5600g:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5600g_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5600g:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5600x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5600x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5600x_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5600x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5700g_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5700g:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5700g_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5700g:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5700x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5700x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5700x_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5700x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5800x3d_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5800x3d:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5800x3d_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5800x3d:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5800x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5800x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5800x_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5800x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5900x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5900x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5900x_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5900x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5950x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5950x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_5950x_firmware:comboam4v2_pi_1.2.0.6:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_5950x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3100_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3100:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3100_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3100:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3300x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3300x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3500_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3500_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3500x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3500x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3600_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3600:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3600_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3600:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3600x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3600x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3600x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3600x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3600xt_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3600xt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3600xt_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3600xt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3800x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3800x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3800x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3800x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3800xt_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3800xt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3800xt_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3800xt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3900_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3900:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3900_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3900:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3900x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3900x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3900x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3900x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3900xt_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3900xt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3900xt_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3900xt:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3950x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3950x:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_3950x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_3950x:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-46755 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-46755 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.03%

score

0.33366

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: