Description
The AWS S3 Crypto SDK sends an unencrypted hash of the plaintext alongside the ciphertext as a metadata field. This hash can be used to brute force the plaintext, if the hash is readable to the attacker. AWS now blocks this metadata field, but older SDK versions still send it.
Scores
CVSS v3
4.3
EPSS
0.0008
EPSS Percentile
23.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-326
Status
published
Products (2)
amazon/aws_software_development_kit
< 1.34.0
aws/aws-sdk-go
0 - 1.34.0Go
Published
Dec 27, 2022
Tracked Since
Feb 18, 2026