BYD DiLink OS 13.1.32.2307211.1 Log Dump reliance on security through obscurity

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.
2.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in BYD DiLink OS 13.1.32.2307211.1. The impacted element is an unknown function of the component Log Dump. Executing a manipulation can lead to reliance on security through obscurity. This vulnerability appears as CVE-2025-7020. The physical device can be targeted for the attack. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in BYD DiLink OS 13.1.32.2307211.1. This vulnerability affects an unknown functionality of the component Log Dump. The manipulation with an unknown input leads to a reliance on security through obscurity vulnerability. The CWE definition for the vulnerability is CWE-656. The product uses a protection mechanism whose strength depends heavily on its obscurity, such that knowledge of its algorithms or key data is sufficient to defeat the mechanism. As an impact it is known to affect confidentiality. CVE summarizes:

An incorrect encryption implementation vulnerability exists in the system log dump feature of BYD's DiLink 3.0 OS (e.g. in the model ATTO3). An attacker with physical access to the vehicle can bypass the encryption of log dumps on the In-Vehicle Infotainment (IVI) unit's storage. This allows the attacker to access and read system logs containing sensitive data, including personally identifiable information (PII) and location data. This vulnerability was introduced in a patch intended to fix CVE-2024-54728.

The weakness was presented by Lior Zur Lotan. The advisory is shared for download at asrg.io. This vulnerability was named CVE-2025-7020 since 07/02/2025. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-24049). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 2.4
VulDB Meta Temp Score: 2.4

VulDB Base Score: 2.4
VulDB Temp Score: 2.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Reliance on security through obscurity
CWE: CWE-656
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/02/2025 CVE reserved
08/09/2025 +38 days Advisory disclosed
08/09/2025 +0 days VulDB entry created
08/12/2025 +3 days VulDB entry last update

Sourcesinfo

Advisory: asrg.io
Researcher: Lior Zur Lotan
Status: Not defined

CVE: CVE-2025-7020 (🔒)
GCVE (CVE): GCVE-0-2025-7020
GCVE (VulDB): GCVE-100-319348
EUVD: 🔒

Entryinfo

Created: 08/09/2025 18:51
Updated: 08/12/2025 07:38
Changes: 08/09/2025 18:51 (68), 08/09/2025 19:15 (1), 08/12/2025 07:38 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!