CVE-2021-4217
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I. Basic Information for CVE-2021-4217
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Info-ZIP UnZip 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Info-ZIP UnZip是美国Greg Roelofs个人开发者的一套基于Unix平台的用于对“.zip”文件格式进行解压的工具。 Info-ZIP UnZip 存在安全漏洞，该漏洞源于其堆Unicode字符串处理不当，可能允许攻击者输入一个特殊制作的zip文件发生空指针解引用，导致崩溃或代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | unzip | unzip 6.0 | - |
II. Public POCs for CVE-2021-4217
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=2044583x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2021-4217x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-4217
Same Patch Batch · n/a · 2022-08-24 · 41 CVEs total
| CVE-2022-25903 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-24375 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2021-4155 | Red Hat Enterprise Linux 权限许可和访问控制问题漏洞 | |
| CVE-2021-39815 | Google Android 资源管理错误漏洞 | |
| CVE-2022-20122 | Google Android 资源管理错误漏洞 | |
| CVE-2021-4178 | Kubernetes 代码问题漏洞 | |
| CVE-2021-4209 | GnuTLS 代码问题漏洞 | |
| CVE-2021-4213 | Linux jss 安全漏洞 | |
| CVE-2021-4218 | Linux kernel 安全漏洞 | |
| CVE-2021-4122 | cryptsetup 数据伪造问题漏洞 | |
| CVE-2021-4125 | Red Hat OpenShift 代码问题漏洞 | |
| CVE-2021-4142 | Red Hat Satellite 授权问题漏洞 | |
| CVE-2021-0946 | Google Android 缓冲区错误漏洞 | |
| CVE-2021-4158 | QEMU 代码问题漏洞 | |
| CVE-2021-4159 | Linux kernel 安全漏洞 | |
| CVE-2021-4041 | Ansible-Runner 操作系统命令注入漏洞 | |
| CVE-2021-4040 | Red Hat AMQ Broker 缓冲区错误漏洞 | |
| CVE-2022-37181 | 72crm 代码问题漏洞 | |
| CVE-2022-37178 | 72crm SQL注入漏洞 | |
| CVE-2018-14520 | Kirby 跨站脚本漏洞 |
Showing top 20 of 41 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same weakness: CWE-476
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Null pointer dereference in php_mb_check_encoding() via mb_e - CVE-2026-7262
NULL pointer dereference in SOAP apache:Map decoder with mis - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error
V. Comments for CVE-2021-4217
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