Disclosures
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In the software world, it is expected for security vulnerabilities to be immediately announced, thus giving operators an opportunity to take protective measure against attackers.
Vulnerabilities typically take two forms:
Vulnerabilities that, if exploited, would harm the software operator. In the case of Etn-sc, examples would be:
A bug that would allow remote reading or writing of OS files, or
Remote command execution, or
Bugs that would leak cryptographic keys
Vulnerabilities that, if exploited, would harm the Electroneum Smart Chain mainnet. In the case of Etn-sc, examples would be:
Consensus vulnerabilities, which would cause a chain split,
Denial-of-service during block processing, whereby a malicious transaction could cause the network to crash.
Denial-of-service via p2p networking, whereby portions of the network could be made inaccessible due to crashes or resource consumption.
In most cases so far, vulnerabilities in Etn-sc have been of the second type, where the health of the network is a concern, rather than individual node operators. For such issues, Etn-sc reserves the right to silently patch and ship fixes in new releases.
In the case of Electroneum, it takes a lot of time (weeks, months) to get node operators to update even to a scheduled hard fork. If we were to highlight that a release contains important consensus or DoS fixes, there is always a risk of someone trying to beat node operators to the punch, and exploit the vulnerability. Delaying a potential attack sufficiently to make the majority of node operators immune may be worth the temporary loss of transparency.
The primary goal for the Electroneum team is the health of the Electroneum Smart Chain network as a whole, and the decision whether or not to publish details about a serious vulnerability boils down to minimising the risk and/or impact of discovery and exploitation.
At certain times, it's better to remain silent. This practice is also followed by other projects such as .
Our policy on public transparency is:
If we silently fix a vulnerability and include the fix in release X, then,
After 4-8 weeks, we will disclose that X contained a security-fix.
After an additional 4-8 weeks, we will publish the details about the vulnerability.
We hope that this provides sufficient balance between transparency versus the need for secrecy, and aids node operators and downstream projects in keeping up to date with what versions to run on their infrastructure.
The JSON file of known vulnerabilities below is a list of objects, one for each vulnerability, with the following keys:
name
Unique name given to the vulnerability.
uid
Unique identifier of the vulnerability. Format ETN-SC-<year>-<sequential id>
summary
Short description of the vulnerability.
description
Detailed description of the vulnerability.
links
List of relevant URLs with more detailed information (optional).
introduced
The first published Etn-sc version that contained the vulnerability (optional).
fixed
The first published Etn-sc version that did not contain the vulnerability anymore.
published
The date at which the vulnerability became known publicly (optional).
severity
Severity of the vulnerability: low, medium, high, critical.
Takes into account the severity of impact and likelihood of exploitation.
check
This field contains a regular expression, which can be used against the reported web3_clientVersion of a node. If the check matches, the node is with a high likelihood affected by the vulnerability.
CVE
The assigned CVE identifier, if available (optional)
We prefer to not rely on GitHub as the only/primary publishing protocol for security advisories, but we plan to use the GitHub-advisory process as a second channel for disseminating vulnerability-information.
In keeping with this policy, we have taken inspiration from - see below.
There is a JSON-formatted list () of some of the known security-relevant vulnerabilities concerning Etn-sc.
Etn-sc has a built-in command to check whether it is affected by any publically disclosed vulnerability, using the command etn-sc version-check. This command will fetch the latest json file (and the accompanying , and cross-check the data against its own version number.
Advisories published via GitHub can be accessed .
The ETN-Network runs a bug bounty program to reward responsible disclosures of bugs in client software and specs. The details are provided on our page.