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Vulnerabilites related to dfinity - candid

CVE-2023-6245 (GCVE-0-2023-6245)

Vulnerability from cvelistv5

Published

2023-12-08 14:26

Modified

2024-12-02 14:33

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-1288 - Improper Validation of Consistency within Input
CWE-168 - Improper Handling of Inconsistent Special Elements
CWE-20 - Improper Input Validation

Summary

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.

References

►

URL

Tags

	https://github.com/dfinity/candid/pull/478
	https://internetcomputer.org/docs/current/references/candid-ref
	https://github.com/dfinity/candid/blob/master/spec/Candid.md
	https://github.com/dfinity/candid/security/advisories/GHSA-7787-p7x6-fq3j
	https://internetcomputer.org/docs/current/references/ic-interface-spec

Impacted products

	Vendor	Product	Version
	Internet Computer	Candid	Version: 0.9.0

Show details on NVD website

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Vulnerability from fkie_nvd