CVE-2023-6245— Candid 安全漏洞

Infinite decoding loop through specially crafted payload

The Candid library causes a Denial of Service while parsing a specially crafted payload with 'empty' data type. For example, if the payload is `record { * ; empty }` and the canister interface expects `record { * }` then the Rust candid decoder treats empty as an extra field required by the type. The problem with the type empty is that the candid Rust library wrongly categorizes empty as a recoverable error when skipping the field and thus causing an infinite decoding loop. Canisters using affected versions of candid are exposed to denial of service by causing the decoding to run indefinitely until the canister traps due to reaching maximum instruction limit per execution round. Repeated exposure to the payload will result in degraded performance of the canister. Note: Canisters written in Motoko are unaffected.

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

不可达退出条件的循环(无限循环)

Candid 安全漏洞

Candid是一种接口描述语言 (IDL)，用于与运行在 Internet 计算机上的容器进行交互。 Candid 0.9.0到0.9.10版本存在安全漏洞，该漏洞源于Candid 库在解析具有数据类型的特制有效负载时会导致拒绝服务。

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