vulnerability / NVI-00013946 / Revision 1
klever-go: SFT add-quantity `int64` overflow bypasses a finite per-nonce MaxSupply
GitHub lists this reviewed advisory for github.com/klever-io/klever-go. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/klever-io/klever-go
source listed< 1.7.19
## Summary On the SFT add-quantity path the only supply bound is `SFTAddCirculation`, which does `meta.Circulation += amount` with **no overflow guard**, then checks `if meta.Circulation > meta.MaxSupply && meta.MaxSupply != 0`. If `amount` overflows `int64` and wraps **negative**, `negative > MaxSupply` is false, the cap check passes, the function returns `nil`, and the balance credit stands. A nonce created with a finite `MaxSupply` (e.g. 1000) can thus be minted to ~`MaxInt64` tokens in one transaction. The fungible mint path is **not** vulnerable — it has a post-increment `MintedValue <= 0` guard that the SFT path lacks. ## Affected code - `core/kapp/systemAccount/systemAcount.go:132-138` (`SFTAddCirculation`, the unguarded `+=`). - Caller: `core/kapp/kda/mint.go:247-283` (`processSemiFungibleAddQuantity`); contrast guard `mint.go:289`. ## Impact A mint-role holder mints ~9.2e18 units of a nonce whose declared `MaxSupply` is small, with no authorized debit, and corrupts the on-chain `Circulation` counter to a negative value (misleading any market/indexer that reads it). ## Reachability Mint-role holder (asset owner or an address granted the role). The mint `Amount` is a raw
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-mrpp-v6pg-p54x ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.