一、 漏洞 CVE-2021-32708 基础信息
漏洞标题
league/flysystem中的Time-of-check Time-of-use (TOCTOU)竞争条件
来源：AIGC 神龙大模型
漏洞描述信息
league/flysystem中的Time-of-Check Time-of-Use (TOCTOU)竞争条件
来源：AIGC 神龙大模型
CVSS信息
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
来源：AIGC 神龙大模型
漏洞类别
N/A
来源：AIGC 神龙大模型
漏洞标题
Time-of-check Time-of-use (TOCTOU) Race Condition in league/flysystem
来源：美国国家漏洞数据库 NVD
漏洞描述信息
Flysystem is an open source file storage library for PHP. The whitespace normalisation using in 1.x and 2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a malicious user to execute code remotely. The conditions are: A user is allowed to supply the path or filename of an uploaded file, the supplied path or filename is not checked against unicode chars, the supplied pathname checked against an extension deny-list, not an allow-list, the supplied path or filename contains a unicode whitespace char in the extension, the uploaded file is stored in a directory that allows PHP code to be executed. Given these conditions are met a user can upload and execute arbitrary code on the system under attack. The unicode whitespace removal has been replaced with a rejection (exception). For 1.x users, upgrade to 1.1.4. For 2.x users, upgrade to 2.1.1.
来源：美国国家漏洞数据库 NVD
CVSS信息
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源：美国国家漏洞数据库 NVD
漏洞类别
检查时间与使用时间(TOCTOU)的竞争条件
来源：美国国家漏洞数据库 NVD
漏洞标题
thephpleague flysystem 代码注入漏洞
来源：中国国家信息安全漏洞库 CNNVD
漏洞描述信息
Flysystem是一个开源文件存储库。 thephpleague flysystem存在代码注入漏洞，该漏洞源于在某些特定条件下，flysystem可能允许恶意用户远程执行代码。
来源：中国国家信息安全漏洞库 CNNVD
CVSS信息
N/A
来源：中国国家信息安全漏洞库 CNNVD
漏洞类别
代码注入
来源：中国国家信息安全漏洞库 CNNVD
二、漏洞 CVE-2021-32708 的公开POC
# POC 描述 源链接 神龙链接
1 Affected versions of this package are vulnerable to Race Condition. The whitespace normalisation using in 1.x and 2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a malicious user to execute code remotely. https://github.com/fazilbaig1/CVE-2021-32708 POC详情
三、漏洞 CVE-2021-32708 的情报信息