figures
Blog

Comcast Xfinity Web Flaws Exposed Customer Data

Admin Globaldots
13.08.2018
image 2 Min read

There is no comfortable way for an organisation to learn that its website is leaking customer data but one of the most alarming must surely be getting that bad news from a journalist.

This is what appears to have happened to US communications giant Comcast Xfinity, which has had to patch two significant web vulnerabilities after Buzzfeed News learned of the issues from researcher Ryan Stevenson.

Flaw #1

The first was found on the in-home authentication page through which customers can pay bills without the inconvenience of having to log in.

It seems the company authenticated users by asking them to choose their home address from one of four possibilities, selected by looking at one of the headers added to the HTTP request.

The HTTP header used to “identify” the user contained their public-facing Comcast IP address – data that isn’t suitable to use as a secret identifier.

An attacker who knew your IP number could therefore insert it into their own web requests, and keep refreshing the identification page – each time they refreshed, the list of home addresses returned would include your address plus three randomly chosen other addresses.

Flaw #2

The second issue, which builds on the first, was found on a sign-up page for Comcast authorised retailers.

Having used the first vulnerability to gain access to a customer’s address from their IP number, this page could allow an attacker to enter this to carry out a brute force attack to discover the last four digits of their US social security number (SSN).

After entering a valid address, an attacker could cycle through all 10,000 four-digit numbers (0000-9999) until one of them turned out to be the four digits that matched the customer’s SSN – there was no limit on the number of guesses or the speed at which they could be tried.

Image Source

Read more: Naked Security

Comments

0 comments

There’s more to see

slider item
Your Innovation Feed

eBook: Don’t Fortify, Amplify: The New Cloud Security Stack

Steven Puddephatt 25.11.21

2021’s Security leaders deal with everything from cloud-native insider threats to staying one step ahead of the unknown. While the cloud is made to amplify and speed up core business processes, the pressure to fortify cloud-borne assets from possible cyber threats painfully slows things down.  GlobalDots harnessed its 17-year cloud security experience to rethink cloud […]

Read more
slider item
Identity & Access Management (IAM)

How IT can Breeze through Onboardings without Additional Hirings

Dror Arie

Which IT Nuisance Would You Automate First? Employee onboarding is one of the heaviest, most complex operations on a company’s IT. This is especially true in fast-growing companies that may see multiple onboardings per day. And, of course, the wider a company’s software tools array, the more accounts to create and permissions to manage. In […]

Read more
slider item
Cloud Workload Protection

GlobalDots Partners with CWP Innovator Lacework

Li-Or Amir 23.11.21

In its constant endeavor to enrich its cloud security offering with the latest innovation, GlobalDots has recently introduced security unicorn Lacework to its vendor portfolio. Founded in 2015, Lacework offers a cloud security monitoring platform which brings together some of today’s top needs: Workload protection, container & K8s security, compliance monitoring. Last weekend (Nov. 18th, […]

Read more

Unlock Your Cloud Potential

Schedule a call with our experts. Discover new technology and get recommendations to improve your performance.
Contact us
figure figure figure figure figure