CVE-2020-11093 Authorization bypass in Hyperledger Indy

Hyperledger Indy Node is the server portion of a distributed ledger purpose-built for decentralized identity. In Hyperledger Indy before version 1.12.4, there is lack of signature verification on a specific transaction which enables an attacker to make certain unauthorized alterations to the...

CVE-2020-11093

Hyperledger Indy Node (server for decentralized identity) prior to version 1.12.4 suffers from lack of signature verification on a specific transaction (nym update). The flaw allows any DID to request a nym update for another DID without changing its own ROLE or VERKEY, regardless of sender. Cons...

Hyperledger Indy Node Data Forgery Issue Vulnerability

Indy Node is a distributed Ledger implementation based on indy-plenum Byzantine Fault Tolerance Protocol from the Linux Foundation, USA. Versions of Hyperledger Indy prior to 1.12.4 suffer from a data forgery issue vulnerability that stems from the absence of transaction-specific signature...

Hyperledger: The “payload” Field of Transactions in a Block Reveals the Private Data to All Peers

To whom it may concern, We are a research group conducting research on Hyperledger Fabric 2.0. We find a design flaw about the “payload” field of transactions, which can reveal the Private Data to all peers in one channel. When a client invokes a function to read the private data, the is stored i...

Hyperledger: Vulnerabilities in Endorsement Mechanism of Private Data Related Transactions in Hyperledger Fabric 2.0

To whom it may concern, We report design flaws that can be exploited by private data collection non-member organizations to forge endorsements of read-related transactions and return fake values to a user. When a user issues a read-only transaction proposal to a endorser in the private data...

Hyperledger: Vulnerability in Private Data Endorsement Policy Management in Hyperledger Fabric 2.0

To whom it may concern, We are a research group conducting research on the Hyperledger Fabric. We find a design flaw about the endorsement policy of Private Data related transactions in Hyperledger Fabric 2.0. When private data adopts a default chaincode-level MAJORITY endorsement policy, the...

Hyperledger Iroha has a flawed logic vulnerability

Hyperledger Iroha is a distributed system for asset creation and management based on blockchain technology. A security vulnerability exists in Hyperledger Iroha versions 1.0beta and 1.0.0beta-1. An attacker can exploit the vulnerability by sending a specially crafted request to bypass signature...

Hyperledger: RCE vulnerability in Hyperledger Fabric SDK for Java

Hyperledger Fabric SDK for Java version 2.0.0 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerability. In the following source code files and corresponding line number, an arbitrary file gets parsed by...

Hyperledger: Enrolling to a CA that returns an empty response crashes the node process

If a CA server responds with an empty response during enrollment, an exception is thrown in the event emitter on end. This is an uncaughtException and causes the containing node process to exit. To replicate: With the attached files, run: npm install node badCa.js & node index.js This starts a...

Upcoming Speaking Engagements

This is a current list of where and when I am scheduled to speak: I'm speaking at Kiwicon in Wellington, New Zealand on November 16, 2018. I'm appearing on IBM Resilient's End of Year Review webinar on "The Top Cyber Security Trends in 2018 and Predictions for the Year Ahead," December 6, 2018 at...

Upcoming Speaking Engagements

This is a current list of where and when I am scheduled to speak: I'm speaking at Data in Smarter Cities in New York City on October 23, 2018. I'm speaking at the Cyber Security Summit in Minneapolis, Minnesota on October 24, 2018. I'm speaking at ISF's 29th Annual World Congress in Las Vegas,...

Hyperledger: Brute Force of fabric-ca server admin account

fabric-ca server - Default configuration maxenrollments value -1enable outside enrollment - Listening 0.0.0.0:7054easily discoved and can be reached - No limit to wrong password try Above conditions result in brute force to CA server admin account Impact Attack gain a high-level permissioned...

Upcoming Speaking Engagements

This is a current list of where and when I am scheduled to speak: I'm giving a book talk on Click Here to Kill Everybody at the Ford Foundation in New York City, on September 5, 2018. The Aspen Institute's Cybersecurity & Technology Program is holding a book launch for Click Here to Kill Everybod...

CVE-2018-3756

Hyperledger Iroha versions v1.0beta and v1.0.0beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes...

Design/Logic Flaw

Hyperledger Iroha versions v1.0beta and v1.0.0beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes...

PYSEC-2018-150

Hyperledger Iroha versions v1.0beta and v1.0.0beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes...

CVE-2018-3756

Hyperledger Iroha versions v1.0beta and v1.0.0beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes...

PYSEC-2018-150

Hyperledger Iroha versions v1.0beta and v1.0.0beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes...

CVE-2018-3756

Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to a transaction and block signature verification bypass in the transaction and block validator. This flaw allows a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validat...

CVE-2018-3756

Hyperledger Iroha versions v1.0beta and v1.0.0beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes...