{"id":"CVE-2025-32029","aliases":["GHSA-p4qw-7j9g-5h53"],"url":"https://o3.security/vulnerability/CVE-2025-32029","summary":"ts-asn1-der has Incorrect DER Encoding of Numbers Leading to Denial of Service and Incorrect Value Representation","details":"### Impact\n\nIncorrect `number` DER encoding can lead to denial on service for absolute values in the range `2**31` -- `2**32 - 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.\n\nIn addition, `number` encoding had a few other issues that resulted it in it not encoding values correctly.\n\n### Patches\n\nThe issue is patched in version `1.0.4`. Users are recommended to upgrade as soon as possible.\n\n### Workarounds\n\nIf upgrading is not an option, the issue can be mitigated by validating inputs to `Asn1Integer` to ensure that they are not smaller than `-2**31 + 1` and no larger than `2**31 - 1`. Although `Asn1Integer` supports `bigint` inputs, some additional implementation issues make using `bigint` as a mitigation inviable, as it will result in incorrect values.\n\nIf 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. Note that this requires computing the correct DER encoding externally.\n\n### References\n\nN/A","published":"2025-04-07T20:13:48.176Z","modified":"2026-08-12T03:51:17.958388824Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@apeleghq/asn1-der","fixedVersion":"1.0.4"}],"fix":{"url":"https://github.com/ApelegHQ/ts-asn1-der/commit/b2bc9032cbe19755d234a27d79e47a7e52993af8","label":"ApelegHQ/ts-asn1-der@b2bc903"},"references":[{"type":"ADVISORY","url":"https://github.com/ApelegHQ/ts-asn1-der/security/advisories/GHSA-p4qw-7j9g-5h53"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/32xxx/CVE-2025-32029.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-32029"},{"type":"FIX","url":"https://github.com/ApelegHQ/ts-asn1-der/commit/b2bc9032cbe19755d234a27d79e47a7e52993af8"},{"type":"PACKAGE","url":"https://github.com/ApelegHQ/ts-asn1-der"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:17.958388824Z"}}