CVE-2020-8911General(amazon / aws_s3_crypto_sdk)

LOWCVSS 5.6 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A padding oracle vulnerability exists in the AWS S3 Crypto SDK for GoLang versions prior to V2. The SDK allows users to encrypt files with AES-CBC without computing a Message Authentication Code (MAC), which then allows an attacker who has write access to the target's S3 bucket and can observe whether or not an endpoint with access to the key can decrypt a file, they can reconstruct the plaintext with (on average) 128*length (plaintext) queries to the endpoint, by exploiting CBC's ability to manipulate the bytes of the next block and PKCS5 padding errors. It is recommended to update your SDK to V2 or later, and re-encrypt your files.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-327

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • aws_s3_crypto_sdk

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • General: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
Products
aws_s3_crypto_sdk

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-02-28: 102-28
Signal classification1 categories
General
1100.0%
Full discourse1 post
  • David@davidsheyi
    General

    5/ CVE-2020-8911 illustrates how misconfigurations can escalate. Always patch and audit configurations regularly to avoid vulnerabilities #InfoSec #Security

    Post summary

    The statement references CVE-2020-8911 only to highlight the risk of misconfigurations and encourages routine patching without providing technical or exploit details.

    1000049
    556 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appamazonaws_s3_crypto_sdk-golang-

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