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CWE-783 操作符优先级逻辑错误 类漏洞列表 6

CWE-783 操作符优先级逻辑错误 类弱点 6 条 CVE 漏洞汇总，含 AI 中文分析。

CWE-783属于运算符优先级逻辑错误，源于代码表达式中运算符优先级导致逻辑判断偏差。攻击者常利用此缺陷绕过身份验证或访问控制，从而获取未授权权限。开发者应避免在安全关键代码中使用复杂表达式，通过添加括号明确运算顺序，或简化逻辑结构，确保代码行为符合预期，防止因优先级误解引发严重安全后果。

MITRE CWE 官方描述
CWE：CWE-783 运算符优先级逻辑错误 英文：产品使用了这样一个表达式，其中运算符优先级导致使用了错误的逻辑。 虽然这通常只是一个 bug，但如果运算符优先级逻辑错误出现在安全关键代码（security-critical code）中，例如用于做出身份验证决策（authentication decision），则可能导致严重后果。
常见影响 (1)
Confidentiality, Integrity, AvailabilityVaries by Context, Unexpected State
The consequences will vary based on the context surrounding the incorrect precedence. In a security decision, integrity or confidentiality are the most likely results. Otherwise, a crash may occur due to the software reaching an unexpected state.
缓解措施 (1)
ImplementationRegularly wrap sub-expressions in parentheses, especially in security-critical code.
代码示例 (2)
In the following example, the method validateUser makes a call to another method to authenticate a username and password for a user and returns a success or failure code.
#define FAIL 0 #define SUCCESS 1 ... int validateUser(char *username, char *password) { int isUser = FAIL; // call method to authenticate username and password // if authentication fails then return failure otherwise return success if (isUser = AuthenticateUser(username, password) == FAIL) { return isUser; } else { isUser = SUCCESS; } return isUser; }
Bad · C
... if ((isUser = AuthenticateUser(username, password)) == FAIL) { ...
Good · C
In this example, the method calculates the return on investment for an accounting/financial application. The return on investment is calculated by subtracting the initial investment costs from the current value and then dividing by the initial investment costs.
public double calculateReturnOnInvestment(double currentValue, double initialInvestment) { double returnROI = 0.0; // calculate return on investment returnROI = currentValue - initialInvestment / initialInvestment; return returnROI; }
Bad · Java
... returnROI = (currentValue - initialInvestment) / initialInvestment; ...
Good · Java
CVE ID标题CVSS风险等级Published
CVE-2026-7270 某软件 execve()本地提权漏洞 — FreeBSD 7.8AIHighAI2026-04-30
CVE-2026-0209 Pure Storage FlashArray Purity 安全漏洞 — FlashArray 7.5 -2026-04-14
CVE-2026-25233 pearweb 安全漏洞 — pearweb 5.4AIMediumAI2026-02-03
CVE-2025-27512 Zincati 安全漏洞 — zincati 8.1 -2025-03-17
CVE-2024-20480 Cisco IOS XE Software 安全漏洞 — Cisco IOS XE Software 8.6 High2024-09-25
CVE-2024-20314 Cisco IOS XE Software 安全漏洞 — Cisco IOS XE Software 8.6 High2024-03-27

CWE-783（操作符优先级逻辑错误） 是常见的弱点类别，本平台收录该类弱点关联的 6 条 CVE 漏洞。