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EthermintApplication · Evmos

CVE-2022-35936

MEDIUM · 5.3 CVSS v3.1 Published 2022-08-05
Fix available
A fix is available. Upgrade to 0.18.0 / 7.0.0 or later.
See remediation →
62/100
Remediation priority · Elevated
Public exploit Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Ethermint is an Ethereum library. In Ethermint running versions before `v0.17.2`, the contract `selfdestruct` invocation permanently removes the corresponding bytecode from the internal database storage. However, due to a bug in the `DeleteAccount`function, all contracts that used the identical bytecode (i.e shared the same `CodeHash`) will also stop working once one contract invokes `selfdestruct`, even though the other contracts did not invoke the `selfdestruct` OPCODE. This vulnerability has been patched in Ethermint version v0.18.0. The patch has state machine-breaking changes for applications using Ethermint, so a coordinated upgrade procedure is required. A workaround is available. If a contract is subject to DoS due to this issue, the user can redeploy the same contract, i.e. with identical bytecode, so that the original contract's code is recovered. The new contract deployment restores the `bytecode hash -> bytecode` entry in the internal state.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
EthermintApplication
Affected:< 0.18.0
KavaApplication
Affected:< 0.18.0
CronosApplication
Affected:<= 0.7.0
EvmosApplication
Affected:< 7.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 0.18.0 / 7.0.0 or later
Fixed in 0.18.07.0.0
Vendor patch github.com →
Recommended fix High confidence

Ethermint v0.18.0 (or corresponding patched versions for Kava, Cronos, Evmos)

  1. Upgrade Ethermint to version v0.18.0 or later
  2. If using Kava, upgrade to a version >= 0.18.0
  3. If using Cronos, upgrade to version > 0.7.0
  4. If using Evmos, upgrade to version >= 7.0.0
  5. Execute a coordinated upgrade procedure as the patch contains state machine-breaking changes
  6. After upgrading, verify contract functionality for any contracts that may have been affected by the selfdestruct bug
  7. Alternatively, as a workaround for affected contracts, redeploy the same contract with identical bytecode to restore the bytecode hash -> bytecode entry in state
Caveat The v0.18.0 patch contains state machine-breaking changes requiring a coordinated upgrade procedure for applications using Ethermint

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-35936 in production — separate from our analysis above.

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