#amazon

## Summary S3 Encryption Client for Java is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. When the encrypted data key (EDK) is stored in an "Instruction File" instead of S3's metadata record, the EDK is exposed to an "Invisible Salamanders" attack (https://eprint.iacr.org/2019/016), which could allow the EDK to be replaced with a new key. ## Impact ### Background - Key Commitment There is a cryptographic property whereby under certain conditions, a single ciphertext could be decrypted into 2 different plaintexts by using different encryption keys. To address this issue, strong encryption schemes use what is known as "key commitment", a process by which an encrypted message can only be decrypted by one key; the key used to originally encrypt the message. In older versions of S3EC, when customers are also using a feature called "Instruction File" to store EDKs, key commitment is not implemented because multiple E...

## Summary S3 Encryption Client for .NET (S3EC) is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. When the encrypted data key (EDK) is stored in an "Instruction File" instead of S3's metadata record, the EDK is exposed to an "Invisible Salamanders" attack (https://eprint.iacr.org/2019/016), which could allow the EDK to be replaced with a new key. ## Impact ### Background - Key Commitment There is a cryptographic property whereby under certain conditions, a single ciphertext can be decrypted into 2 different plaintexts by using different encryption keys. To address this issue, strong encryption schemes use what is known as "key commitment", a process by which an encrypted message can only be decrypted by one key; the key used to originally encrypt the message. In older versions of S3EC, when customers are also using a feature called "Instruction File" to store EDKs, key commitment is not implemented because mul...

Threat actors wielding stolen AWS Identity and Access Management (IAM) credentials leverage Amazon EC and EC2 infrastructure across multiple customer environments.

A “purchase order” PDF blocked by Malwarebytes led to a credential-harvesting phishing site. So we analyzed the attack and where the data went next.

Amazon detailed a long-running campaign by Russia against critical infrastructure organizations, particularly in the energy sector.

Amazon Threat Intelligence reports Russian GRU hackers are increasingly breaking into critical infrastructure by abusing misconfigured devices instead of exploiting software vulnerabilities.

An ongoing campaign has been observed targeting Amazon Web Services (AWS) customers using compromised Identity and Access Management (IAM) credentials to enable cryptocurrency mining. The activity, first detected by Amazon's GuardDuty managed threat detection service and its automated security monitoring systems on November 2, 2025, employs never-before-seen persistence techniques to hamper

Direct navigation -- the act of visiting a website by manually typing a domain name in a web browser -- has never been riskier: A new study finds the vast majority of "parked" domains -- mostly expired or dormant domain names, or common misspellings of popular websites -- are now configured to redirect visitors to sites that foist scams and malware.

Amazon's threat intelligence team has disclosed details of a "years-long" Russian state-sponsored campaign that targeted Western critical infrastructure between 2021 and 2025. Targets of the campaign included energy sector organizations across Western nations, critical infrastructure providers in North America and Europe, and entities with cloud-hosted network infrastructure. The activity has

The security vulnerability known as React2Shell is being exploited by threat actors to deliver malware families like KSwapDoor and ZnDoor, according to findings from Palo Alto Networks Unit 42 and NTT Security. "KSwapDoor is a professionally engineered remote access tool designed with stealth in mind," Justin Moore, senior manager of threat intel research at Palo Alto Networks Unit 42, said in a