Commercial vehicle-mounted CAN bus fuzzy test method based on field weight

A technology of CAN bus and fuzz testing, which is applied in the field of field weight-based commercial vehicle CAN bus fuzz testing, can solve the problem of low validity of test cases and achieve the effect of improving test efficiency

Active Publication Date: 2021-02-19
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

This method is a protocol-based fuzzing method, which solves the problem of low validity of test cases

Method used

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  • Commercial vehicle-mounted CAN bus fuzzy test method based on field weight
  • Commercial vehicle-mounted CAN bus fuzzy test method based on field weight
  • Commercial vehicle-mounted CAN bus fuzzy test method based on field weight

Examples

Experimental program
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Embodiment

[0067] In order to verify the effectiveness of the method proposed in the present invention, the experimental evaluation is carried out through the online public CAN message data set. In this embodiment, the messages whose identifiers are ID 0x191 and ID 0x260 are selected to carry out the fuzzy testing method of the commercial vehicle CAN bus based on the field weight.

[0068] (1) Field division method verification based on bit flip rate

[0069] The field division of the identifier ID 0x191 and ID 0x260 is shown in Table 1. The field division of 0x191 is basically correct. In the fourth byte, there is a difference from the standard format because the content of the collected message does not change. This difference can be resolved by adding Packet volume resolved. The estimated format of 0x260 is completely consistent with the standard format, which shows that the field division of commercial vehicle CAN message data field based on the bit flip rate is effective.

[0070]...

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Abstract

The invention discloses a commercial vehicle-mounted CAN bus fuzzy test method based on field weight, which comprises the following steps of: firstly, screening messages with the same identifiers froma collected message data set, performing flip rate calculation on each bit in a message data field, dividing the data field into an invariable field and a variable field, in order to refine the fieldand determine the field attribute, calculating the bit flipping rate ratio of adjacent bits in the variable field, comparing the bit flipping rate ratio with a set threshold value to realize re-division of the variable field, determining variable field attributes according to the change characteristics and distribution characteristics of the variable field inner bit flipping rate, after all the variable fields are determined, calculating the average turnover rate of each variable field, giving weight values to the variable fields, and carrying out probability variation on the variable fieldswhich are independent or combined according to the weight values to generate fuzzy test cases. The method is a protocol-based fuzzy test method, and solves the problem of low effectiveness of test cases.

Description

technical field [0001] The invention relates to a vehicle communication vulnerability testing method, in particular to a field weight-based fuzzy testing method for a commercial vehicle CAN bus. Background technique [0002] Intelligentization and networking have gradually become the main development direction of the current automobile. There are a large number of electronic control units (ECU, Electronic Control Unit) in the vehicle, and the types are complex. They transmit important data about vehicle operation and form a vehicle network based on the CAN bus. The number of external communication interfaces is gradually increasing, and the security of connected cars is facing severe challenges. When an attacker injects a malicious message into the vehicle CAN bus network, the vehicle may generate an abnormal response, thereby exposing the vulnerability of the commercial vehicle CAN bus protocol, thereby affecting the life safety of the vehicle or passengers. [0003] The C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/22G06F11/36
CPCG06F11/221G06F11/2273G06F11/3684G06F11/3688
Inventor 李中伟姜文淇谭凯金显吉杨明刘晓胜佟为明
Owner HARBIN INST OF TECH
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