CVE-2020-37280
cbor-sync through 1.0.4 Memory Exhaustion via Unchecked CBOR Array Lengths
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 12, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 12, 2026
Description
cbor-sync through 1.0.4 contains a resource exhaustion vulnerability in CBOR.decode that trusts declared array and map lengths without checking remaining input. Remote attackers can supply a tiny crafted CBOR payload declaring huge lengths to drive billions of iterations, exhausting CPU and process memory.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-789 Memory Allocation with Excessive Size Value
Affected Products
| Product | Versions |
|---|---|
cbor-syncPelionIoT |
|
References
- GitHub Pull Request #4issue-trackingpatch
- GitHub Issue #6issue-tracking
- https://github.com/PelionIoT/cbor-syncproduct
- VulnCheck Advisory: cbor-sync through 1.0.4 Memory Exhaustion via Unchecked CBOR Array Lengthsthird-party-advisory
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