AWS safety faces challenges after a decade of dominance


Amazon Internet Companies has a stranglehold on the general public cloud market, however the firm’s dominance in cloud safety is dealing with new challenges.

The world’s largest cloud supplier earned a popularity during the last 10 years as an influential chief in IaaS safety, due to introducing merchandise akin to AWS Id & Entry Administration and Key Administration Service within the earlier a part of the last decade to more moderen developments in event-driven safety. AWS safety features helped the cloud service supplier set up its highly effective market place; in accordance with Gartner, AWS in 2018 earned an estimated $15.5 billion in income for practically 48% of the worldwide public IaaS market.

However on the re:Invent 2019 convention final month, most of the new safety instruments and options introduced have been designed to repair present points, akin to misconfigurations and knowledge exposures, relatively than push AWS safety to new heights. “There wasn’t a lot at re:Invent that I might name safety,” stated Colin Percival, founding father of open supply backup service Tarsnap and an AWS Group Hero, through e mail. “Most of what individuals are speaking about as safety enhancements handle what I might name misconfiguration threat.”

In the meantime, Microsoft has not solely elevated its cloud market share but in addition invested closely in new Azure safety features that some imagine rival AWS’ choices. Wealthy Mogull, president and analyst at Securosis, stated there are two sides to AWS safety — the inherent safety of the platform’s structure, and the extra instruments and merchandise AWS supplies to clients.

“By way of the inherent safety of the platform, I nonetheless assume Amazon could be very far forward,” he stated, citing AWS’ strengths akin to availability zones, segregation, and granular id and entry administration. “Microsoft has completed lots with Azure, however Amazon nonetheless has a multi-year lead. However in terms of safety merchandise, it is extra of a blended bag.”

Most of what individuals are speaking about as [AWS] safety enhancements handle what I might name misconfiguration threat.
Colin PercivalFounder, Tarsnap

Microsoft has been in a position to shut the hole in recent times with the introduction of its personal set of merchandise and instruments that compete with AWS safety choices, he stated. “Azure Safety Heart and AWS Safety Hub are fairly comparable, and each have strengths and weaknesses,” Mogull stated. “Azure Sentinel is sort of fascinating and appears extra full than AWS Detective.”

New instruments, outdated issues

Arguably the most important AWS safety improvement at re:Invent was a brand new instrument designed to repair a persistent drawback for the cloud supplier: unintentional S3 bucket exposures. The IAM Entry Analyzer, which is a part of AWS’ Id and Entry Administration (IAM) console, alerts customers when an S3 bucket is presumably misconfigured to permit public entry through the web and lets them block such entry with one click on.

AWS had beforehand made smaller strikes, together with modifications to S3 safety settings and interfaces, to curb the spate of high-profile and embarrassing S3 exposures in recent times. IAM Entry Analyzer is arguably the strongest transfer but to resolve the continuing drawback.

“They created the S3 publicity situation, however additionally they mounted it,” stated Jerry Gamblin, principal safety engineer at vulnerability administration vendor Kenna Safety, which is an AWS buyer. “I feel they’ve actually stepped up in that regard.”

Nonetheless, some AWS specialists really feel the instrument does not absolutely resolve the issue. “Instruments like IAM Entry Analyzer will certainly assist some individuals,” Percival stated, “however there is a large distinction between warning people who they screwed up and permitting individuals to make methods safer than they might beforehand.”

Scott Piper, an AWS safety marketing consultant and founding father of Summit Route in Salt Lake Metropolis, stated “It is one more instrument within the toolbelt and it is free, nevertheless it’s not enabled by default.”

There are different points with IAM Entry Analyzer. “With this extra data, you need to get that to the shopper not directly,” Piper stated. “And doing that may be awkward and tough with this service and others in AWS like GuardDuty, as a result of it does not make cross-region communication very simple.”

For instance, EC2 areas are remoted to make sure the best doable fault tolerance and stability for patrons. However Piper stated the isolation presents challenges for patrons utilizing a number of areas as a result of it is tough to mixture GuardDuty alerts to a single supply, which requires safety groups to research “a number of panes of glass as a substitute of 1.”

Metadata complications

AWS not too long ago addressed one other safety situation that turned a high-profile concern for enterprises following the Capital One breach final summer time. The attacker in that exploited an SSRF vulnerability to entry the AWS metadata service for firm’s EC2 situations, which allowed them to acquire credentials contained within the service.

The Capital One breach led to criticism from safety specialists in addition to lawmakers akin to Sen. Ron Wyden (D-Ore.), who questioned why AWS hadn’t addressed SSRF vulnerabilities for its metadata service. The shortage of safety across the metadata service has involved some AWS specialists for years; in 2016, Percival penned a weblog submit titled “EC2’s most harmful characteristic.”

“I feel the most important drawback Amazon has had in recent times — judging by the shoppers affected — is the shortage of safety round their occasion metadata service,” Percival instructed SearchSecurity.

In November, AWS made a number of updates to the metadata service to forestall unauthorized entry, together with the choice to show off entry to the service altogether. Mogull stated the metadata service replace was essential as a result of it improved safety round AWS account credentials.

However like different AWS safety features, the metadata service modifications will not be enabled by default. Percival stated enabling the replace by default would’ve brought about points for enterprise purposes and companies that depend on the prevailing model of the service. “Amazon was completely proper in making their modifications opt-in since if that they had completed in any other case, they’d have damaged the entire present code that makes use of the service,” he stated. “I think about that after roughly everybody’s code has been up to date, they’re going to swap this from opt-in to opt-out — however it’s going to take years earlier than we get to that time.”

Percival additionally stated the replace is “incomplete” as a result of it addresses widespread misconfigurations however not software program bugs. (Percival is engaged on an open supply instrument that he says will present “a much more complete repair to this drawback,” which he hopes to launch later this month.)

Nonetheless, Piper stated the metadata service replace is a vital step for AWS safety as a result of it confirmed the cloud supplier was keen to acknowledge there was an issue with the prevailing service. That willingness and responsiveness hasn’t at all times been there prior to now, he stated.

“AWS has traditionally had the philosophy of offering instruments to clients, and it is sort of as much as clients to make use of them and in the event that they shoot themselves within the foot, then it is the shoppers’ fault,” Piper stated. “I feel AWS is beginning to enhance and alter that philosophy to assist clients extra.”

AWS safety’s street forward

Whereas the metadata service replace and IAM Entry Analyzer addressed lingering safety points, specialists highlighted different new developments that would strengthen AWS’ place in cloud safety.

AWS Nitro Enclaves, for instance, is a brand new EC2 functionality launched at re:Invent 2019 that enables clients to create remoted situations for delicate knowledge. The Nitro Enclaves, which shall be out there in preview this 12 months, are digital machines hooked up to EC2 situations however have CPU and reminiscence isolation from the situations and may be accessed solely via safe native connections.

“Nitro Enclaves could have a big effect for patrons due to its isolation and compartmentalization capabilities” which can give enterprises’ delicate knowledge a further layer of safety towards potential breaches, Mogull stated.

Percival agreed that Nitro Enclaves may presumably “increase the ceiling,” for AWS Safety, although he cautioned towards utilizing them. “Enclaves are famously tough for individuals to make use of accurately, so it is arduous to foretell whether or not they may make an enormous distinction or find yourself being one other of the various ‘Amazon additionally has this characteristic, which no person ever makes use of’ footnotes.”

Specialists additionally stated AWS’ transfer to strengthen its ARM-based processor enterprise may have main safety implications. The cloud supplier introduced at re:Invent 2019 that it is going to be launching EC2 situations that run on its new, custom-made ARM chips, dubbed Graviton2.

Gamblin stated the Graviton2 processors are a safety play partially due to current microprocessor vulnerabilities and aspect channel assaults like Meltdown and Spectre. Whereas some ARM chips have been affected by each Meltdown and Spectre, subsequent aspect channel assaults and Spectre variants have largely affected x86 processors.

“Amazon does not wish to depend on different chips which may be weak to aspect channel assaults and will must be taken offline and rebooted or undergo efficiency points due to mitigations,” Gamblin stated.

Percival stated he was excited by the potential for the cloud supplier collaborating in ARM’s work on the “Digital Safety by Design” initiative, a private-sector partnership with the UK that’s targeted partially on essentially restructuring — and enhancing — processor safety. The outcomes of that challenge shall be years down the street, Percival stated, however it might present a dedication from AWS to as soon as once more elevating the bar for safety.

“If it really works out — and it is a decade-long challenge, which is inherently experimental in nature — it may very well be the most important step ahead for laptop safety in a era.”



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