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scgbckbone

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146 commits1 monitored projects48 candidates2 high-risk analyses
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COLDCARD firmwareCoinkite146 commits48 candidates2 high risk
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Moderate 66 AI analysisMessage 50 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

bugfix: detect RNG_SR_SEIS and RNG_SR_SECS, retry safely, and fail closed on persistent faults

This update fixes how the COLDCARD hardware wallet's random-number generator (RNG) handles rare hardware faults. Previously, the device could silently continue using weak or repeated random numbers if the RNG reported a seed error. Now it …

RNG seed-error flag detection added (RNG_SR_SEIS, RNG_SR_SECS)Bounded retry with recovery sequence instead of silent continuationFail-closed escalation on persistent RNG faults
82ced47aby scgbckbone+117−295 files
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Moderate 61 AI analysisMessage 50 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

rng: discard 12 words after SEIS clear per RM0432 32.3.7

This commit changes how the COLDCARD hardware wallet's random-number generator (RNG) recovers from a rare 'seed error' condition. The manufacturer is now following an STMicroelectronics guideline to throw away the first 12 random numbers a…

RNG recovery routine previously did not discard post-recovery outputNew behavior follows vendor reference-manual recommendation (RM0432 32.3.7)Randomness is used for cryptographic key material in a hardware wallet
43b21392by scgbckbone+33−22 files
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Informational 15 AI analysisMessage 74 · Adequate
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

docs: why RNG clock errors don't invalidate RNG_DR

This commit only adds explanatory comments to two source files about why the COLDCARD firmware ignores certain hardware random-number-generator clock-error flags. It does not change any code behavior. The comments cite ST documentation say…

6e403982by scgbckbone+15−02 files
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Low 33 AI analysisMessage 57 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

fix: can crash if scanner not initialized

This is a small bug-fix in the COLDCARD hardware wallet's battery monitoring code. It prevents a crash that could occur if a background battery check runs before the QR-code scanner module has finished starting up. The change makes the cod…

Null-pointer-like guard added to prevent crash in background taskBackground task (batt_idle_logout) could terminate unexpectedly without the fixCrash in battery/logout logic could affect device availability or user experience
aaab8a78by scgbckbone+1−11 file
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Informational 15 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

bump version to 5.5.1 & 1.4.1Q

This commit only changes version numbers in two build files and a changelog heading. There is no code change, no bug fix, and no security-related content.

0b21d07cby scgbckbone+4−43 files
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Low 38 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

limit BIP-322 msg length to 330 chars

This commit adds a 330-character limit to BIP-322 proof-of-reserve messages on the COLDCARD hardware wallet. Without the limit, an attacker could craft a very long message that might be used to mislead the user, overflow display buffers, o…

Input length bound added to user-facing signed messageAssertion failure prevents processing of oversized messagesEmpty message already rejected; documentation now also requires non-empty message
b29d2347by scgbckbone+41−13 files
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Low 29 AI analysisMessage 50 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

standalone encrypted backups for Secure Notes & Passwords

This commit adds a new feature to the COLDCARD firmware: encrypted backups for Secure Notes & Passwords. Previously, exporting notes and passwords to a microSD card produced an unencrypted JSON file. Now the device can encrypt that export …

New encryption feature for previously cleartext notes/password exportsRefactoring of backup password and 7z encryption code into reusable helpersAddition of inner_ext parameter to backup decryption to support .json payloads
d58fdfd5by scgbckbone+467−1246 files
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Moderate 61 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

revert SSSP bypass PIN login

This commit reverts a previous security fix. The original fix prevented a 'bypass PIN' (a special trick PIN that hides the wallet) from being used a second time to finish logging in without ever entering the real main PIN. After this rever…

Reverts a prior bugfix that enforced main PIN verification after a trick PIN unlockRemoves has_secrets() check that blocked zero-secret bypass PIN reuse at second login promptChangelog removal of security-relevant bugfix description
542dcd32by scgbckbone+211−163 files
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Low 27 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

apply note or pwd as b39 passphrase

This commit adds a new feature to the COLDCARD hardware wallet that lets users apply the text of a Secure Note or the value of a Secure Note password as their BIP-39 wallet passphrase. It also tightens how printable ASCII is checked in a f…

New feature exposes stored Secure Notes / Passwords as BIP-39 passphrasesInput validation relies on length, printable-ASCII, and rstrip of trailing whitespace/tab/newlineRefactored text sanitization changes control-flow for message signing and PSBT message warnings
0ef6413cby scgbckbone+223−289 files
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Informational 15 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

Add groups for secure notes

This commit adds a new feature to the COLDCARD firmware that lets users organize their saved secure notes and passwords into groups, similar to folders. It is a user-experience improvement and does not fix or introduce any security vulnera…

edae8c1eby scgbckbone+345−183 files
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Low 32 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

Fix QR scanner setup and sleep handling

This commit fixes several bugs in how the COLDCARD Q1 hardware wallet talks to its built-in QR-code scanner. The changes make scanner startup more reliable, prevent stale 'go to sleep' commands from accidentally stopping a scan that just s…

Hardware peripheral reset line held in asserted state (potential wake/power issue)Async sleep command could race with newly started scan (state-management bug)CancelledError from asyncio.wait_for_ms could strand setup task
ad2088d2by scgbckbone+163−693 files
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Low 26 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

Keep scanner reinit state instance-local

This tiny code change moves a 'needs reinit' flag from being shared across all QR scanner objects to being kept inside each individual scanner object. In the real device code the flag is removed from the base class; in the simulator it is …

Shared mutable class-level state removedState variable made instance-localPotential race-condition / state-confusion class eliminated
55340577by scgbckbone+1−22 files
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Moderate 61 AI analysisMessage 50 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

fix bypass_tmp return to master secret with xprv type

This commit fixes a bug in how the COLDCARD wallet creates encrypted backups when a temporary seed is being bypassed. Previously, if the main secret was stored as an extended private key ('xprv') rather than as BIP39 seed words, the backup…

Incorrect secret encoding when bypassing temporary seedPotential master secret exposure or backup corruption due to type mismatchMissing branch for xprv-type master secret in backup path
67a5c6c2by scgbckbone+7−21 file
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Informational 15 AI analysisMessage 0 · Opaque
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

fix tests

This commit only updates two test files to fix failing tests. It changes test input data and adds an address-format parameter that a helper function now requires. There is no change to the actual COLDCARD firmware or wallet code that users…

eb112eb3by scgbckbone+9−22 files
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Moderate 57 AI analysisMessage 18 · Opaque
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

bugfix: p2pk

This commit fixes a bug in the COLDCARD hardware wallet that prevented it from correctly signing Bitcoin transactions that spend from 'pay-to-public-key' (P2PK) outputs. P2PK is an older, uncommon output type where coins are locked directl…

Bugfix explicitly described in release notes as 'P2PK signing was broken'P2PK scriptPubKey parsing now supports both compressed and uncompressed public keysPubkey comparison logic corrected for uncompressed P2PK keys
0d04e5e1by scgbckbone+268−328 files
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High 78 AI analysisMessage 50 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

Reject witness-only UTXO for legacy inputs; Suppress fee for unverified witness UTXOs;normalize legacy inputs to proper utxo

This update fixes a bug in the COLDCARD hardware wallet where a malicious or malformed Bitcoin transaction file (PSBT) could trick the device into using the wrong amount of money for a non-SegWit (legacy) input. Specifically, if the file o…

Fixes legacy input amount spoofing via witness-only UTXORejects PSBT inputs that provide only PSBT_IN_WITNESS_UTXO for non-SegWit inputs the device must signPrefers full non_witness_utxo over witness_utxo when both are present
59eb529aby scgbckbone+224−656 files
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Moderate 66 AI analysisMessage 28 · Opaque
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

improve USB validation

This commit tightens input-length checks for commands that COLDCARD receives over its USB interface. Before the change, several commands would accept packets that were too short, too long, or internally inconsistent. That could let a malic…

Adds length/bounds assertions to USB command parsersPrevents trailing bytes after fixed-length command payloadsPrevents short/under-length command payloads from being processed
d5aba396by scgbckbone+310−234 files
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Low 42 AI analysisMessage 28 · Opaque
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

bugfix: 1of1 multisig

This commit fixes a bug in the COLDCARD hardware wallet firmware that prevented signing of 1-of-1 multisignature transactions. The change also hardens how the wallet detects single-key P2SH-wrapped SegWit inputs so it no longer misclassifi…

PSBT input classification bug fixed1-of-1 multisig signing restoredP2SH-P2WPKH now requires exactly one BIP32 subpath
6fd256dbby scgbckbone+45−204 files
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Informational 24 AI analysisMessage 45 · Thin
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

keep NFC export tag live for repeated probes

This is a bugfix for the COLDCARD hardware wallet's NFC sharing feature. Previously, when exporting data over NFC, the device would write the tag contents fresh for each tap/scan attempt. Some phones check the tag multiple times before acc…

NFC export reliability fixRepeated NFC probe handlingNDEF tag state persistence
6716fcbaby scgbckbone+13−92 files
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Low 40 AI analysisMessage 28 · Opaque
CK CoinkiteCOLDCARD firmware BitcoinHardware wallets

WIF Store upgrade

This commit upgrades the COLDCARD firmware's WIF Store feature so that individual private keys imported as WIF can sign transactions even when the PSBT file lacks the usual BIP-32 key-path metadata. It adds address/scriptPubKey auto-detect…

Signing path now accepts PSBT inputs with no BIP-32 derivation data if a matching WIF-store pubkey is foundSynthetic subpaths with zero fingerprint are injected for WIF-matched inputsRemoved assertion that key paths must be at least depth 8 (vl >= 8)
1dddd885by scgbckbone+717−849 files
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