Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS12OTM1LXBxbXItZzh2Oc0W1w

Unexpected panics in num-bigint

Impact

Two scenarios were reported where BigInt and BigUint multiplication may unexpectedly panic.

• The internal mac3 function did not expect the possibility of non-empty all-zero inputs, leading to an unwrap() panic.
• A buffer was allocated with less capacity than needed for an intermediate result, leading to an assertion panic.

Rust panics can either cause stack unwinding or program abort, depending on the application configuration. In some settings, an unexpected panic may constitute a denial-of-service vulnerability.

Patches

Both problems were introduced in version 0.4.1, and are fixed in version 0.4.3.

For more information

If you have any questions or comments about this advisory, please open an issue in the num-bigint repo.

Acknowledgements

Thanks to Guido Vranken and Arvid Norberg for privately reporting these issues to the author.

References

• GHSA-v935-pqmr-g8v9
• num-bigint#228

Permalink: https://github.com/advisories/GHSA-v935-pqmr-g8v9
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS12OTM1LXBxbXItZzh2Oc0W1w
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 2 years ago
Updated: over 1 year ago

Identifiers: GHSA-v935-pqmr-g8v9
References:

• https://github.com/rust-num/num-bigint/security/advisories/GHSA-v935-pqmr-g8v9
• https://github.com/rust-num/num-bigint/pull/228
• https://github.com/advisories/GHSA-v935-pqmr-g8v9

Repository: https://github.com/rust-num/num-bigint
Blast Radius: 0.0

Affected Packages