VDB-230827 · CVE-2023-20738 · ALPS07645149

MediaTek MT9982 vcu out-of-bounds write

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.
5.8	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in MediaTek MT5696, MT5836, MT5838, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8168, MT8175, MT8195, MT8365, MT8395, MT8673, MT8781, MT8786, MT8789, MT8791T, MT8797, MT9000, MT9015, MT9023, MT9025, MT9618, MT9649, MT9653, MT9679, MT9687, MT9689, MT9902, MT9932, MT9952, MT9972 and MT9982. This vulnerability affects unknown code of the component vcu. This manipulation causes out-of-bounds write. This vulnerability is tracked as CVE-2023-20738. The attack is restricted to local execution. No exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability has been found in MediaTek MT5696, MT5836, MT5838, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8168, MT8175, MT8195, MT8365, MT8395, MT8673, MT8781, MT8786, MT8789, MT8791T, MT8797, MT9000, MT9015, MT9023, MT9025, MT9618, MT9649, MT9653, MT9679, MT9687, MT9689, MT9902, MT9932, MT9952, MT9972 and MT9982 (Chip Software) and classified as critical. Affected by this vulnerability is some unknown functionality of the component vcu. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In vcu, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07645149; Issue ID: ALPS07645173.

The weakness was disclosed 06/06/2023 as ALPS07645149. It is possible to read the advisory at corp.mediatek.com. This vulnerability is known as CVE-2023-20738 since 10/28/2022. The technical details are unknown and an exploit is not publicly available.

Applying the patch ALPS07645149 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: 5.9
VulDB Meta Temp Score: 5.8

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

NVD Base Score: 6.7
NVD Vector: 🔍

CNA Base Score: 6.7
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: ALPS07645149

Timelineinfo

10/28/2022 🔍
06/06/2023 +221 days 🔍
06/06/2023 +0 days 🔍
01/08/2025 +581 days 🔍

Sourcesinfo

Advisory: ALPS07645149
Status: Confirmed

CVE: CVE-2023-20738 (🔍)
GCVE (CVE): GCVE-0-2023-20738
GCVE (VulDB): GCVE-100-230827

Entryinfo

Created: 06/06/2023 16:03
Updated: 01/08/2025 00:09
Changes: 06/06/2023 16:03 (41), 06/30/2023 17:31 (11), 01/08/2025 00:09 (26)
Complete: 🔍
Cache ID: 216::103