Medium, CVSS 6.9npmAmendedPublished
ts-asn1-der has Incorrect DER Encoding of Numbers Leading to Denial of Service and Incorrect Value Representation
CVE-2025-32029 · GHSA-p4qw-7j9g-5h53
- Affected
- npm @apeleghq/asn1-der < 1.0.4
- Fixed in
- 1.0.4· Vendor fix available
- Issue
- Impact Incorrect number DER encoding can lead to denial on service for absolute values in the range 231 -- 232 - 1. The arithmetic in the numBitLen didn't take into account that values in this range could result in a negative result upon applying the operator, leading to an infinite loop. In addition, number encoding had a few other issues that resulted it in it not encoding values correctly. Patches The issue is patched in version 1.0.4. Users are recommended to upgrade as soon as possible. Workarounds If upgrading is not an option, the issue can be mitigated by validating inputs to Asn1Integer to ensure that they are not smaller than -231 + 1 and no larger than 231 - 1. Although Asn1Integer supports bigint inputs, some additional implementation issues make using bigint as a mitigation inviable, as it will result in incorrect values. If upgrading is not an option and range checks are impractical or undesirable, input to Asn1Integer can be provided as a buffer to be used directly.…
Recommended action: Upgrade to 1.0.4 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.