CWE-234 未对缺失参数进行处理

Failure to Handle Missing Parameter

结构: Simple

Abstraction: Variant

状态: Incomplete

被利用可能性: High

基本描述

If too few arguments are sent to a function, the function will still pop the expected number of arguments from the stack. Potentially, a variable number of arguments could be exhausted in a function as well.

相关缺陷

  • cwe_Nature: ChildOf cwe_CWE_ID: 233 cwe_View_ID: 1000 cwe_Ordinal: Primary

  • cwe_Nature: ChildOf cwe_CWE_ID: 233 cwe_View_ID: 699 cwe_Ordinal: Primary

适用平台

Language: {'cwe_Class': 'Language-Independent', 'cwe_Prevalence': 'Undetermined'}

常见的影响

范围 影响 注释
['Integrity', 'Confidentiality', 'Availability', 'Access Control'] ['Execute Unauthorized Code or Commands', 'Gain Privileges or Assume Identity'] There is the potential for arbitrary code execution with privileges of the vulnerable program if function parameter list is exhausted.
Availability DoS: Crash, Exit, or Restart Potentially a program could fail if it needs more arguments then are available.

可能的缓解方案

Build and Compilation

策略:

This issue can be simply combated with the use of proper build process.

Implementation

策略:

Forward declare all functions. This is the recommended solution. Properly forward declaration of all used functions will result in a compiler error if too few arguments are sent to a function.

示例代码

例

The following example demonstrates the weakness.

bad C

foo_funct(one, two);

void foo_funct(int one, int two, int three) {
printf("1) %d\n2) %d\n3) %d\n", one, two, three);
}

bad C

void some_function(int foo, ...) {
int a[3], i;
va_list ap;
va_start(ap, foo);
for (i = 0; i < sizeof(a) / sizeof(int); i++) a[i] = va_arg(ap, int);
va_end(ap);
}

int main(int argc, char *argv[]) {
some_function(17, 42);
}

This can be exploited to disclose information with no work whatsoever. In fact, each time this function is run, it will print out the next 4 bytes on the stack after the two numbers sent to it.

分析过的案例

标识 说明 链接
CVE-2004-0276 Server earlier allows remote attackers to cause a denial of service (crash) via an HTTP request with a sequence of "%" characters and a missing Host field. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0276
CVE-2002-1488 Chat client allows remote malicious IRC servers to cause a denial of service (crash) via a PART message with (1) a missing channel or (2) a channel that the user is not in. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1488
CVE-2002-1169 Proxy allows remote attackers to cause a denial of service (crash) via an HTTP request to helpout.exe with a missing HTTP version numbers. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1169
CVE-2000-0521 Web server allows disclosure of CGI source code via an HTTP request without the version number. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0521
CVE-2001-0590 Application server allows a remote attacker to read the source code to arbitrary 'jsp' files via a malformed URL request which does not end with an HTTP protocol specification. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0590
CVE-2003-0239 Chat software allows remote attackers to cause a denial of service via malformed GIF89a headers that do not contain a GCT (Global Color Table) or an LCT (Local Color Table) after an Image Descriptor. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0239
CVE-2002-1023 Server allows remote attackers to cause a denial of service (crash) via an HTTP GET request without a URI. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1023
CVE-2002-1236 CGI crashes when called without any arguments. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1236
CVE-2003-0422 CGI crashes when called without any arguments. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0422
CVE-2002-1531 Crash in HTTP request without a Content-Length field. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1531
CVE-2002-1077 Crash in HTTP request without a Content-Length field. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1077
CVE-2002-1358 Empty elements/strings in protocol test suite affect many SSH2 servers/clients. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1358
CVE-2003-0477 FTP server crashes in PORT command without an argument. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0477
CVE-2002-0107 Resultant infoleak in web server via GET requests without HTTP/1.0 version string. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0107
CVE-2002-0596 GET request with empty parameter leads to error message infoleak (path disclosure). https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0596

Notes

分类映射

映射的分类名 ImNode ID Fit Mapped Node Name
PLOVER Missing Parameter Error
CLASP Missing parameter