{"items":[{"id":"NVI-00009634","kind":"supply_chain_event","title":"Malicious code in web3-signer-kit (RubyGems)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-m6qx-67h3-wwrh"],"plain_summary":"GitHub lists this malware advisory for web3-signer-kit. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-17add9bc17b531882787e74509f860d7"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-17add9bc17b531882787e74509f860d7","url":"https://github.com/advisories/GHSA-m6qx-67h3-wwrh","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-m6qx-67h3-wwrh","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:53.250Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-17add9bc17b531882787e74509f860d7"],"technology":"web3-signer-kit","known_exclusions":[],"conditions_summary":"## Source: amazon-inspector (fe57c8011ef7048ef33ccdb828615b8efd9ab10799a2a730d12c2d854c2e0895)\nThe gem's extconf.rb decodes a base64 literal and eval's it at `gem install` time inside a double-forked, session-detached child whose stdio is redirected to /dev/null. The decoded payload opens a TCPSocket to 45.138.12.177:8089 and bridges a `/bin/sh` process over that socket via IO.popen + IO.copy_stream, yielding full-host remote code execution for the operator of that endpoint. Execution is gated by sandbox-evasion checks that skip CI, ephemeral/short-uptime hosts, analyst-style usernames, and analysis paths, and requires developer artifacts (~/.ssh, ~/.gitconfig, ~/.gem/credentials) to be present before firing; a randomized sleep of 1200+rand(1200) seconds further delays detonation. The package has no legitimate functionality: metadata describes it as a 'web3 signer kit' while the README advertises `bitcoin-rpc-lite`, the library exposes only stub methods (`build_id`, `healthy?`), and extconf.rb calls `create_makefile('bitcoin_rpc_lite_native')` with no C sources shipped. The entire gem is a decoy wrapper around the dropper in extconf.rb.\n\n---\n\nCredit: [OpenSSF](https://github.com/os","public_affected_ranges":["= 0.9.1"]}],"null_published_at":"2026-10-31T22:13:39.926Z","source_updated_at":"2026-10-11T15:31:25.000Z","source_disclosed_at":"2026-10-11T15:31:14.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T22:06:53.250Z"}],"next_cursor":null,"snapshot_revision":"42594"}