SendGrid resets passwords as investigation reveals deeper breach

An employee account was compromised, which gave access to customers' email lists

SendGrid is resetting the passwords for all of its customers after an investigation showed a cyberattack it sustained earlier this month was more extensive than first realized.

The company, which provides a service for companies to mass email their customers without getting blocked, said earlier this month an account of a Bitcoin-related customer was compromised and used to send phishing emails.

Further investigation by FireEye's Mandiant division had showed the attackers also compromised a SendGrid employee's account and accessed internal systems on three days in February and March, wrote David Campbell, the company's chief security officer.

The attackers would have access to usernames, email addresses, salted and hashed passwords for SendGrid customer and employee accounts, Campbell wrote. The attackers also accessed servers containing email lists for its customers and customer contact information. Payment card information was not compromised, as SendGrid does not store it.

"We have not found any forensic evidence that customer lists or customer contact information was stolen," Campbell wrote. "However, as a precautionary measure, we are implementing a system-wide password reset."

SendGrid sends 14 billion emails a month for 180,000 customers, according to its website.

Compromising providers such as SendGrid is very useful for cyberattackers since their speciality is sending email that is vetted and will not be stopped by spam filters.

Campbell recommended that those who cryptographically sign their email with DKIM (DomainKeys Identified Mail) generate new keys. DKIM wraps a cryptographic signature around an email that verifies the domain name through which the message was sent, which helps more easily filter out spoofed messages from legitimate ones.

SendGrid's customers are also advised to set up two-factor authentication, a system which involves entering a one-time passcode or other time-sensitive bit of information as an additional defense.

The company is also working on another security measure, API Keys, which will let administrators generate authentication credentials that are separate from their usernames and passwords. Those keys can be generated for different applications and servers, which makes it easier to revoke one without service disruption, according to SendGrid's website.

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags data breachExploits / vulnerabilitiesSendGrid

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Jeremy Kirk

IDG News Service
Show Comments

Father’s Day Gift Guide

Brand Post

PC World Evaluation Team Review - MSI GT75 TITAN

"I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it."

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?