medium5.9
CVE-2026-3337
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing an…
Impact
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis. The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm. Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Amazon | Aws-Lc-Fips-Sys | from 0.13.0 before 0.13.12 |
| Amazon | Aws-Lc-Sys | from 0.14.0 before 0.38.0 |
| Amazon | Aws Libcrypto | from 1.21.0 before 1.69.0 from 3.0.0 before 3.2.0 |