What is the CVSS score of CVE-2023-6245?

CVE-2023-6245 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 1.2%.

Is there a patch available for CVE-2023-6245?

Yes, a patch is available for CVE-2023-6245. Update the affected software to the latest version immediately.

Candid CVE-2023-6245

HIGH

Improper Input Validation (CWE-20)

2023-12-08 6b35d637-e00f-4228-858c-b20ad6e1d07b

Denial Of Service Candid

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Dec 08, 2023 - 15:15 nvd

HIGH 7.5

DescriptionNVD

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.

AnalysisAI

The Candid library causes a Denial of Service while parsing a specially crafted payload with 'empty' data type. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-20. 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. Affected products include: Dfinity Candid.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.