VDB-238675 · CVE-2023-20849 · ALPS07340433

MediaTek MT8781 imgsys_cmdq use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.7	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in MediaTek MT2713, MT6895, MT6897, MT6983, MT8188, MT8195, MT8395 and MT8781 and classified as problematic. This affects the function imgsys_cmdq. This manipulation causes use after free. This vulnerability is registered as CVE-2023-20849. The attack needs to be launched locally. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability has been found in MediaTek MT2713, MT6895, MT6897, MT6983, MT8188, MT8195, MT8395 and MT8781 (Chip Software) and classified as problematic. Affected by this vulnerability is the function imgsys_cmdq. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In imgsys_cmdq, there is a possible use after free due to a missing valid range checking. This could lead to local escalation of privilege with System execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS07340433; Issue ID: ALPS07340350.

The weakness was published 09/04/2023 as ALPS07340433. It is possible to read the advisory at corp.mediatek.com. This vulnerability is known as CVE-2023-20849 since 10/28/2022. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch ALPS07340433 is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Chip Software

Vendor

MediaTek

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: ALPS07340433

Timelineinfo

10/28/2022 🔍
09/04/2023 +311 days 🔍
09/04/2023 +0 days 🔍
10/01/2024 +393 days 🔍

Sourcesinfo

Advisory: ALPS07340433
Status: Confirmed

CVE: CVE-2023-20849 (🔍)
GCVE (CVE): GCVE-0-2023-20849
GCVE (VulDB): GCVE-100-238675

Entryinfo

Created: 09/04/2023 07:21
Updated: 10/01/2024 22:57
Changes: 09/04/2023 07:21 (40), 09/30/2023 08:41 (11), 10/01/2024 22:57 (27)
Complete: 🔍
Cache ID: 216::103