目标达成 感谢每一位支持者 — 我们达成了 100% 目标！

目标: 1000 元 · 已筹: 1359 元

100%
请我们喝杯咖啡

CWE-476 空指针解引用 类漏洞列表 1557

CWE-476 空指针解引用 类弱点 1557 条 CVE 漏洞汇总，含 AI 中文分析。

CWE-476空指针解引用属于内存安全类漏洞，指程序在指针为NULL时仍尝试访问其指向的内存。攻击者通常通过构造特定输入触发空指针，导致程序崩溃引发拒绝服务，或在特定架构下利用该异常改变执行流以执行恶意代码。开发者应避免在解引用前未验证指针有效性，通过添加空值检查、使用静态分析工具检测潜在风险，并确保代码逻辑能妥善处理无效指针情况，从而从根本上消除隐患。

MITRE CWE 官方描述
CWE：CWE-476 NULL Pointer Dereference（空指针解引用） 英文：The product dereferences a pointer that it expects to be valid but is NULL. 译文：产品解引用了一个它预期为有效但实际上为 NULL 的指针。
常见影响 (2)
Availability DoS: Crash, Exit, or Restart
NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation.
Integrity, Confidentiality Execute Unauthorized Code or Commands, Read Memory, Modify Memory
In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution.
缓解措施 (5)
Implementation For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Requirements Select a programming language that is not susceptible to these issues.
Implementation Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Effectiveness: Moderate
Architecture and Design Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Implementation Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
代码示例 (2)
This example takes an IP address from a user, verifies that it is well formed and then looks up the hostname and copies it into a buffer.
void host_lookup(char *user_supplied_addr){ struct hostent *hp; in_addr_t *addr; char hostname[64]; in_addr_t inet_addr(const char *cp); /*routine that ensures user_supplied_addr is in the right format for conversion */ validate_addr_form(user_supplied_addr); addr = inet_addr(user_supplied_addr); hp = gethostbyaddr( addr, sizeof(struct in_addr), AF_INET); strcpy(hostname, hp->h_name); }
Bad · C
In the following code, the programmer assumes that the system always has a property named "cmd" defined. If an attacker can control the program's environment so that "cmd" is not defined, the program throws a NULL pointer exception when it attempts to call the trim() method.
String cmd = System.getProperty("cmd"); cmd = cmd.trim();
Bad · Java
CVE ID 标题 CVSS 风险等级 Published
CVE-2021-37648 Google TensorFlow 代码问题漏洞 — tensorflow 7.8 High 2021-08-12
CVE-2021-37659 Google TensorFlow代码问题漏洞 — tensorflow 7.3 High 2021-08-12
CVE-2021-37637 Google TensorFlow代码问题漏洞 — tensorflow 7.7 High 2021-08-12
CVE-2021-37649 Google TensorFlow 代码问题漏洞 — tensorflow 7.7 High 2021-08-12
CVE-2021-37647 Google TensorFlow代码问题漏洞 — tensorflow 7.7 High 2021-08-12
CVE-2021-37643 Google TensorFlow代码问题漏洞 — tensorflow 7.7 High 2021-08-12
CVE-2021-37639 Google TensorFlow代码问题漏洞 — tensorflow 8.4 High 2021-08-12
CVE-2021-37638 Google TensorFlow 代码问题漏洞 — tensorflow 7.7 High 2021-08-12
CVE-2021-33717 JT2Go 和Teamcenter Visualization 代码问题漏洞 — JT2Go 5.5 - 2021-08-10
CVE-2021-37615 Exiv2 代码问题漏洞 — exiv2 4.7 Medium 2021-08-09
CVE-2021-37616 Exiv2 代码问题漏洞 — exiv2 5.5 Medium 2021-08-09
CVE-2021-33715 Siemens JT Utilities 代码问题漏洞 — JT Utilities 4.7 - 2021-07-13
CVE-2021-33714 Siemens JT Utilities 代码问题漏洞 — JT Utilities 5.5 - 2021-07-13
CVE-2010-4816 FreeBSD 代码问题漏洞 — FreeBSD and OpenBSD ftpd service 7.5 - 2021-06-22
CVE-2021-33572 F-Secure antivirus 代码问题漏洞 — F-Secure Products 3.5 Low 2021-06-21
CVE-2021-31618 EasyApache 代码问题漏洞 — Apache HTTP Server 7.5 - 2021-06-15
CVE-2021-27607 SAP NetWeaver AS ABAP Business Server 代码问题漏洞 — SAP NetWeaver ABAP Server and ABAP Platform (Dispatcher) 7.5 - 2021-06-09
CVE-2021-27630 SAP Netweaver 代码问题漏洞 — SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server) 7.5 - 2021-06-09
CVE-2021-27631 SAP Netweaver和SAP NetWeaver AS ABAP Business Server 代码问题漏洞 — SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server) 7.5 - 2021-06-09
CVE-2021-27632 SAP Netweaver 代码问题漏洞 — SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server) 7.5 - 2021-06-09
CVE-2020-35503 QEMU 代码问题漏洞 — QEMU 6.0 - 2021-06-02
CVE-2020-35505 QEMU 代码问题漏洞 — QEMU 6.0 - 2021-05-28
CVE-2020-35504 QEMU 代码问题漏洞 — QEMU 6.0 - 2021-05-28
CVE-2021-3514 389-ds-base 代码问题漏洞 — 389-ds-base 6.5 - 2021-05-28
CVE-2021-30500 UPX 代码问题漏洞 — upx 7.8 - 2021-05-26
CVE-2021-20196 QEMU 代码问题漏洞 — qemu 6.0 - 2021-05-26
CVE-2021-3320 Zephyr 代码问题漏洞 — zephyr 5.9 Medium 2021-05-24
CVE-2020-10066 Zephyr 代码问题漏洞 — zephyr 2.5 Low 2021-05-24
CVE-2021-3480 slapi-nis 代码问题漏洞 — slapi-nis 7.5 - 2021-05-20
CVE-2021-3537 libxml2 代码问题漏洞 — libxml2 5.9 - 2021-05-14

CWE-476（空指针解引用） 是常见的弱点类别，本平台收录该类弱点关联的 1557 条 CVE 漏洞。