Traffic corruption via zero-length authentication tag
Published Mar 15, 2023 · Updated Feb 27, 2025
Authentication bypass in Arm AArch64cryptolib before 86065c6 allows man-in-the-middle attackers to corrupt decrypted data. In armv8_dec_aes_gcm_full(), an improperly initialized tag-length variable makes the computed AES-GCM tag appear zero-length, so ciphertext modifications pass authentication. Exploitation requires an application to use that API and an attacker able to alter protected traffic; successful modifications produce random cleartext corruption.
Summary
What happened
Authentication bypass in Arm AArch64cryptolib before 86065c6 allows man-in-the-middle attackers to corrupt decrypted data. In armv8_dec_aes_gcm_full(), an improperly initialized tag-length variable makes the computed AES-GCM tag appear zero-length, so ciphertext modifications pass authentication. Exploitation requires an application to use that API and an attacker able to alter protected traffic; successful modifications produce random cleartext corruption.
The record
- CVE
- CVE-2023-26084
- Published
- Mar 15, 2023
- Updated
- Feb 27, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-303, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 15, 2023CVE publishedPublication date reported by the CVE source.
- Feb 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
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Attacks
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