中危 msgpack5_project msgpack5 动态确定对象属性修改的控制不恰当
CVE编号
CVE-2021-21368利用情况
暂无补丁情况
官方补丁披露时间
2021-03-13漏洞描述
msgpack5 is a msgpack v5 implementation for node.js and the browser. In msgpack5 before versions 3.6.1, 4.5.1, and 5.2.1 there is a "Prototype Poisoning" vulnerability. When msgpack5 decodes a map containing a key "__proto__", it assigns the decoded value to __proto__. Object.prototype.__proto__ is an accessor property for the receiver's prototype. If the value corresponding to the key __proto__ decodes to an object or null, msgpack5 sets the decoded object's prototype to that value. An attacker who can submit crafted MessagePack data to a service can use this to produce values that appear to be of other types; may have unexpected prototype properties and methods (for example length, numeric properties, and push et al if __proto__'s value decodes to an Array); and/or may throw unexpected exceptions when used (for example if the __proto__ value decodes to a Map or Date). Other unexpected behavior might be produced for other types. There is no effect on the global prototype. This "prototype poisoning" is sort of a very limited inversion of a prototype pollution attack. Only the decoded value's prototype is affected, and it can only be set to msgpack5 values (though if the victim makes use of custom codecs, anything could be a msgpack5 value). We have not found a way to escalate this to true prototype pollution (absent other bugs in the consumer's code). This has been fixed in msgpack5 version 3.6.1, 4.5.1, and 5.2.1. See the referenced GitHub Security Advisory for an example and more details.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | msgpack5_project | msgpack5 | * | Up to (excluding) 3.6.1 | |||||
| 运行在以下环境 | |||||||||
| 应用 | msgpack5_project | msgpack5 | * | From (including) 4.0.0 | Up to (excluding) 4.5.1 | ||||
| 运行在以下环境 | |||||||||
| 应用 | msgpack5_project | msgpack5 | * | From (including) 5.0.0 | Up to (excluding) 5.2.1 | ||||
- 攻击路径 远程
- 攻击复杂度 复杂
- 权限要求 普通权限
- 影响范围 全局影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-1321 | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') |
| CWE-915 | 动态确定对象属性修改的控制不恰当 |
Exp相关链接
版权声明
本站原创文章转载请注明文章出处及链接，谢谢合作！
评论