Large aggregation pipelines with a specific stage can crash mongod under default configuration

It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16. Workaround: >= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

栈缓冲区溢出

MongoDB 缓冲区错误漏洞

MongoDB是美国MongoDB公司的一种面向文档的数据库管理系统。 MongoDB存在安全漏洞，该漏洞源于stage使用的堆栈帧的大小导致堆栈溢出。以下产品及版本受到影响：MongoDB 5.0.4之前版本、4.4.11之前版本、4.2.16之前版本。

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