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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-6245 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') cwe source acceptance level NIST   DFINITY Foundation  
CWE-20 Improper Input Validation DFINITY Foundation  
CWE-168 Improper Handling of Inconsistent Special Elements DFINITY Foundation  
CWE-1288 Improper Validation of Consistency within Input DFINITY Foundation  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-6245
NVD Published Date:
12/08/2023
NVD Last Modified:
11/21/2024
Source:
DFINITY Foundation