bouncycastle: BC-JAVA: GOSTCTR implementation unable to process more than 255 blocks correctly

A flaw was found in Legion of the Bouncy Castle Inc. BC-JAVA bcprov. The GOSTCTR implementation is unable to securely process more than 255 blocks of data due to keystream reuse. This issue allows an attacker to break the fundamental confidentiality of any data protected by the G3413CTRBlockCiphe...

bkcrack

bkcrack Biham과 Kocher의 알려진 평문 공격known plaintext attack을 사용하여 레거시 zip 암호화를 해독합니다. 개요 ZIP 아카이브는 내용이 압축 및/또는 암호화될 수 있는 많은 항목을 포함할 수 있습니다. 특히, 항목은 전통적인 PKWARE 암호화, 레거시 암호화 또는 ZipCrypto라고 불리는 비밀번호 기반 대칭 암호화 알고리즘으로 암호화될 수 있습니다. 이 알고리즘은 의사 난수 바이트 스트림키스트림을 생성하고, 이를 항목의 내용평문에 XOR하여 암호화된 데이터암호문를 만듭니다. 3개의...

8cryptdo

8CryptDo 8BitDoがGD32ベースのいくつかの製品で使用しているファームウェア暗号化に関する、 リバースエンジニアリングされたドキュメントとツール。 本ドキュメントで説明するアルゴリズムを適用した復号および再暗号化ツールについては 8cryptdo.py を参照。 このツールは、カスタマイズされたファームウェアを作成する可能性を秘めている。 ただし、このリポジトリには公式ファームウェアデータは一切含まれていない。最新の ファームウェアファイルをダウンロードするスクリプトは fwupd/8bitdo-firmware リポジトリにあり、...

HiveV5_keystream_decryptor

HiveV5 キーストリーム復号化ツール PoC はじめに この文書で分析・参照されているHiveサンプルは、@rivitnaによって作成されたこのリストからランダムに選ばれたものです。@rivitna氏に心より感謝します。アーティファクトはVirusTotalプラットフォームで入手できます。 この文書では、ファイル a0h2uih3d2.exe を参照として採用しています。 MD5: 15CF5E0DA094ACDD751A513402A8C941 SHA-1: 72E15AC4473903C814E65E3C06F54EB0399580AA SHA-256:...

CVE-2026-16001

The Bouncy Castle Inc. bc-csharp library (versions before 2.7.0 ) is vulnerable to a message authentication key exposure in the IesEngine stream mode. Specifically, when an IesEngine is constructed without a block cipher, the MAC key is taken from the key derivation output immediately following a...

PT-2026-104102

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...

Fragnesia-go

fragnesia-go SA1つ。一度に1バイト。レースなし。 fragnesia（CVE-2026-46300）のGo移植版です。Dirty Frag脆弱性クラスの一員 - 別のバグ、同じ攻撃面、独自のパッチ。 動作の仕組み tl;dr このバグはLinux XFRM ESP-in-TCPサブシステムに存在します。ファイルからTCP受信キューへデータがspliceされた後、ソケットにTCPULP...

HiveV5_file_decryptor

HiveV5 ファイル復号化ツール PoC はじめに この数か月間に行った作業は、Hive v5-5.2 の悪意のあるファイル暗号化メカニズムを明らかにするために必要なものでした。 この作業は2つの部分に分けられました。 1. キーストリーム復号化 2. 復号化されたキーストリームを使用したファイル復号化 この数か月の作業に対するサポート、対話、助言に対して、素晴らしい @rivitna に感謝いたします。 Hive ランサムウェアなどに関する有用な情報が満載の rivitna の GitHub もぜひご覧ください。 この README...

bouncycastle: BC-JAVA: GOSTCTR implementation unable to process more than 255 blocks correctly

A flaw was found in Legion of the Bouncy Castle Inc. BC-JAVA bcprov. The GOSTCTR implementation is unable to securely process more than 255 blocks of data due to keystream reuse. This issue allows an attacker to break the fundamental confidentiality of any data protected by the G3413CTRBlockCiphe...

CVE-2026-81019

wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce...

CVE-2026-81020 wolfEngine reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record

wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce...

EUVD-2026-67737

wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce...

CVE-2026-81019 wolfProvider reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record

wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce...

EUVD-2026-67736

wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce...

CVE-2026-81019

wolfProvider (by wolfSSL) versions before 1.2.2 generate the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increment it per record. Consequently, every TLS 1.2 and DTLS 1.2 AES-GCM record in a given connection is encrypted with an identical key and nonce pair. Reusing...

PT-2026-83143

Name of the Vulnerable Software and Affected Versions wolfProvider versions prior to 1.2.2 Description The software generates the 8-byte explicit AES-GCM nonce only once when the TLS write key is set and fails to increment it for each record. Consequently, every TLS 1.2 and DTLS 1.2 AES-GCM recor...

CVE-2026-81019: Reusing a Nonce, Key Pair in Encryption

wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce...

PT-2026-83144

Name of the Vulnerable Software and Affected Versions wolfEngine versions prior to 1.4.1 Description wolfEngine fails to increment the 8-byte explicit AES-GCM nonce for each record, generating it only once when the TLS write key is set. Consequently, all TLS 1.2 and DTLS 1.2 AES-GCM records withi...

PT-2026-83148

wolfEngine before 1.4.1 sources the explicit AES-CCM nonce for TLS 1.2 and DTLS 1.2 records from the record input buffer instead of the TLS sequence number carried in the additional authenticated data. Because the record layer leaves the explicit-nonce field for the cipher to populate, the value...

ANT-2026-BT210RQ0 · libtom/libtomcrypt · Cryptographic Logic Flaw

other critical Severity Claude critical · Security research firm - · Maintainer - REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-BT210RQ0: libtomcrypt AES-SIV: universal forgery and plaintext recovery when called without AD In src/encauth/siv/siv.c, ssivS2V and the...