CVE-2022-39242 Incorrect Calculation in Frontier leads to inflated Ethereum chain gas prices
Attackers can inflate Ethereum chain gas prices via block spamming using large refunds, causing denial of service in Frontier.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-39242?
CVE-2022-39242 is a medium-severity denial of service vulnerability in paritytech frontier, published on 24 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Frontier is an Ethereum compatibility layer for Substrate. Prior to commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658, the worst case weight was always accounted as the block weight for all cases. In case of large EVM gas refunds, this can lead to block spamming attacks -- the adversary can construct blocks with transactions that have large amount of refunds or unused gases with reverts, and as a result inflate up the chain gas prices. The impact of this issue is limited in that the spamming attack would still be costly for any adversary, and it has no ability to alter any chain state. This issue has been patched in commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658. There are no known workarounds.
Weakness: CWE-682
Which versions are affected by CVE-2022-39242?
2 open source packages ship an affected version, including pallet-ethereum. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pallet-ethereum crates.io | All versions to 3.0.0 | None |
pallet-ethereum crates.io | All versions to 3.0.0 | None |
Products include Parity Frontier.
How do I fix CVE-2022-39242?
No fix has been published for CVE-2022-39242 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-39242 being exploited?
There is no known exploitation of CVE-2022-39242 in the wild and no public exploit code.
Other vulnerabilities in paritytech frontier
- CVE-2023-45130 Frontier opcode SUICIDE touches too many storage values on large contracts
- CVE-2023-28431 Frontier's modexp precompile is slow for even modulus
- CVE-2022-36008 Message length overflow in frontier
- CVE-2022-21685 Integer underflow in Frontier
- CVE-2022-31111 Discrepency in transfer value and actual value due to incorrect truncation in Frontier
Sources
Also known as GHSA-v57h-6hmh-g2p4.