CVE-2023-2512
Buffer under-read in workerd
描述
### Impact Prior to version v1.20230419.0, the FormData API implementation was subject to an integer overflow. If a FormData instance contained more than 2^31 elements, the `forEach()` method could end up reading from the wrong location in memory while iterating over elements. This would most likely lead to a segmentation fault, but could theoretically allow arbitrary undefined behavior. In order for the bug to be exploitable, the process would need to be able to allocate 160GB of RAM. Due to this, the bug was never exploitable on the Cloudflare Workers platform, but could theoretically be exploitable on deployments of workerd running on machines with a huge amount of memory. Moreover, in order to be remotely exploited, an attacker would have to upload a single form-encoded HTTP request of at least tens of gigabytes in size. The application code would then have to use `request.formData()` to parse the request and `formData.forEach()` to iterate over this data. Due to these limitations, the exploitation likelihood was considered Low. ### Patches A fix that addresses this vulnerability has been released in version v1.20230419.0 and users are encouraged to update to the latest version available. ### References Release - https://github.com/cloudflare/workerd/releases/tag/v1.20230419.0
如何修補 CVE-2023-2512
要修補 CVE-2023-2512,請將受影響套件升級到下列已修補版本。
- —升級至 1.20230419.0 或更新版本
CVE-2023-2512 正在被利用嗎?
低 — EPSS 為 0.6%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 1.20230419.0