The Importance of Code Audit

In the past year, ransomware has frequently broken out, and a large number of companies around the world have been attacked, with a total loss of tens of billions of yuan. Nowadays, risks are always with us all the time, and network security is especially important for enterprises. However, the establishment of an enterprise network security system is a very large project, and different enterprises have different needs. How should enterprises choose appropriate security services to avoid risks? Is the code audit important to the enterprise?

Code audit refers to checking the security defects in the source code, checking whether there are security risks in the program source code, or there are non-standard coding places. Through automatic tools or manual review, the program source code is checked and analyzed one by one. Code audit is a kind of source code analysis aiming at discovering program errors, security vulnerabilities and violation of program specifications. It can find security vulnerabilities that cannot be found by ordinary security testing.

#CodeAudit #OverallcodeAudit #ArtificialCodeAudit #CISA

Why do we need to do code audit?

99% of large websites and systems have been dragged, leaking a large amount of user data or temporarily paralyzing the system. Recently, British airports were attacked by ransomware, and flight information can only be written by hand. The great advantage of doing code audit work well in advance is that it will find out the hidden danger of the system before the hacker, and deploy the security defense measures in advance, so as to ensure that every link of the system can withstand the challenge of hackers in unknown environment, and further improve the trust of customers on the enterprise and platform.

What are the loopholes that hackers can exploit?

1. There are bugs in the software writing

2. Improper system configuration

3. Password theft

4. Explore the unencrypted communication data

5. Design defects

6. System attack

Which companies need to do code audit?

The objects of code audit are mainly PHP, JAVA, asp, NET and other web-related languages. The situations that require code audit are roughly divided into the following five parts.

1. New system platform to be launched soon

2. Websites visited by a large number of users, highly available, and highly concurrent

3. Enterprise platform with sensitive and confidential information such as user data

4. Enterprise platforms with business logic problems in Internet finance

5. A platform for local safety testing of important business functions during development.

Is there any difference between the overall code audit and the artificial code audit of function points?

The overall code audit refers to the overall security audit of all source codes of the audited system by the code audit service personnel, and the code coverage rate is 100%. The overall code audit uses a combination of source code scanning and manual analysis to confirm and find the source security flaws in the code. However, the overall code audit is a white-box analysis. It can only find security vulnerabilities in code writing, but cannot find defects in business functions. The time and cost of the overall code audit is very high, and it is difficult to truly understand this entire set of procedures, and it is even more difficult to understand its business logic in depth. In this case, directional auditing based on function points and interface testing through tools can improve the audit speed and are more suitable for enterprise use.

The artificial code audit of function point is to audit the source code of one or several important function points, find the code security problems of function points, and find some loopholes in business logic level. Manual code audit of function points needs to collect system design documents, system development instructions and other technical data, so that code audit service personnel can better understand the system business functions. Due to the huge workload of artificial code audit, it is necessary to analyze and select important function points to conduct manual code audit. The security engineers of code auditing all have many years of experience in code auditing. First, they will review the general code structure of the program, and then identify the core function points and important interfaces according to the naming of the file. Here are some vulnerabilities that often appear in functions and interfaces.

1. Registration verification

a. Arbitrary user login vulnerability

b. Unauthorized access

2. Retrieve the password

a. Verification code vulnerability

b. Reset administrator password vulnerability

3. File upload

a. Arbitrary file upload vulnerability

b. SQL injection vulnerability

4. Online payment, mostly logic loopholes

a. The payment amount in the data package can be modified directly during the payment process

b. No limit on the number of purchases

c. Request for revisit

d. Interference of other parameters

5. Interface vulnerability

a. The interface of operating database should prevent SQL injection

b. Pay attention to the authentication security of the exposed interface

Code auditing is of great importance and is the core and most significant work in the entire security assurance system, which is often overlooked by people. Powertime reminds everyone that not to neglect the importance of code auditing and to prevent potential security risks. After testing and reinforcement by the senior security engineers of Powertime, the system will become more stable. The test report can help managers make better project decisions, and at the same time it will help to further improve the security construction system and meet the requirements of security compliance.

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