CVE-2023-6245
7.5 · HIGHOverview
CVE-2023-6245 is a high-severity vulnerability affecting dfinity candid. It was published on December 8, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from dfinity. Update candid to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| dfinity | candid | >= 0.9.0, < 0.9.10 | Affected |
References
Frequently Asked Questions
What is CVE-2023-6245?
CVE-2023-6245 is a high-severity vulnerability affecting dfinity candid. It was published on December 8, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2023-6245?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-6245?
Check the references section for vendor advisories and patches from dfinity. Update candid to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-6245?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-6245 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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