CVE-2026-16000

Published: Ott 02, 2026 Last Modified: Ott 02, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,7
Source: 91579145-5d7b-4cc5-b925-a0262ff19630
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

Missing cryptographic step in the DSTU 7624 CCM mode implementation (KCcmBlockCipher) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can observe encrypted messages of known or chosen content to forge ciphertexts with valid authentication tags, via messages encrypted without associated data. The cause is that the G1 block, which binds the nonce, the message length and the parameter flags into the CBC-MAC, was processed only when associated data was present. Without associated data the tag was a CBC-MAC of the plaintext alone, independent of the nonce. Only applications that use KCcmBlockCipher directly and supply no associated data are affected.

325

Missing Cryptographic Step

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Confidentiality Integrity Accountability Non-Repudiation
Potential Impacts:
Bypass Protection Mechanism Read Application Data Modify Application Data Hide Activities
Applicable Platforms
All platforms may be affected
View CWE Details
https://github.com/bcgit/bc-csharp/commit/b01e9e6c0e231b908…
https://github.com/bcgit/bc-csharp/commit/b01e9e6c0e231b90867fbaf03bf148bde6f9c…
https://github.com/bcgit/bc-csharp/wiki/CVE-2026-16000
https://github.com/bcgit/bc-csharp/wiki/CVE-2026-16000