CVE-2020-8897
A weak robustness vulnerability exists in the AWS Encryption SDKs for Java, Python, C and Javalcript prior to versions 2.0.0.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A weak robustness vulnerability exists in the AWS Encryption SDKs for Java, Python, C and Javalcript prior to versions 2.0.0. Due to the non-committing property of AES-GCM (and other AEAD ciphers such as AES-GCM-SIV or (X)ChaCha20Poly1305) used by the SDKs to encrypt messages, an attacker can craft a unique cyphertext which will decrypt to multiple different results, and becomes especially relevant in a multi-recipient setting. We recommend users update their SDK to 2.0.0 or later.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-310, CWE-327
- Affected
- amazon/aws encryption sdk
- Source
- cve-coordination@google.com
References
- https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/Vendor Advisory
- https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphfExploit, Mitigation, Third Party Advisory
- https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/Vendor Advisory
- https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphfExploit, Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.