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CVE-2020-8912

In-band key negotiation issue in AWS S3 Crypto SDK for GoLang

Published: Aug 11, 2020Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-327
2.5LOW
NVD MITRE
EPSS Score
0.2%
Top 86.3%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

A vulnerability in the in-band key negotiation exists in the AWS S3 Crypto SDK for GoLang versions prior to V2. An attacker with write access to the targeted bucket can change the encryption algorithm of an object in the bucket, which can then allow them to change AES-GCM to AES-CTR. Using this in combination with a decryption oracle can reveal the authentication key used by AES-GCM as decrypting the GMAC tag leaves the authentication key recoverable as an algebraic equation. It is recommended to update your SDK to V2 or later, and re-encrypt your files.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-327

Affected Products

Google LLC
commercial·US
AWS S3 Crypto SDK for GoLangLibraryLibrary
OSS Libraries / generic-library
amazon
commercial·US
aws s3 crypto sdkOn-premLibrary
OSS Libraries / generic-library
Go
package-ecosystem
github.com/aws/aws-sdk-go
OSS Libraries

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
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References

https://aws.amazon.com/blogs/developer/updates-to-the-amazon-s3-encryption-client/?s=09
aws.amazon.com
https://github.com/google/security-research/security/advisories/GHSA-7f33-f4f5-xwgw
github.com
https://nvd.nist.gov/vuln/detail/CVE-2020-8912
nvd.nist.gov
and 7 more references View all →

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