Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Application Security

3/20/2019
12:00 PM
50%
50%

'Critical' Denial-of-Service Bug Patched in Facebook Fizz

Researchers report a now-patched DoS vulnerability in Facebook Fizz, its open source implementation of the TLS protocol.

A critical denial-of-service (DoS) vulnerability was found in Facebook Fizz, the social media giant's open source implementation of the Transport Layer Security (TLS) protocol, Semmle reports.

If you're not familiar, Fizz enables secure communication with Web services and is used on most of Facebook's internal and external infrastructure. Facebook made the source code open source last August; since then, it was likely used by other organizations and projects. The bug was discovered by Kevin Backhouse of Semmle's research team and reported Feb. 20.

Semmle says the vulnerability is "relatively easy to trigger" for unauthenticated remote attackers. It's considered a DoS bug because it causes an infinite loop in Fizz and renders the service unavailable for other users. By exploiting this, an attacker could take down any infrastructure that relies on Fizz but couldn't gain unauthorized access to user data.

Facebook issued a patch (CVE-2019-3560) on Feb. 25, and its Web services are no longer vulnerable. Web applications dependent on Fizz are urged to upgrade their Fizz libraries. Semmle was awarded a $10,000 bug bounty for the discovery, which is out of the ordinary for DoS.

"While denial-of-service issues are typically not considered as part of our bug bounty program, this submission discussed scenarios which could have had significant risk," Facebook said in an email to Semmle. The security firm will donate the bounty to Techtonica (which doubles the donation to $20,000) and match the original $10,000 bounty with a donation to Community Servings.

Read more details here.

 

 

Join Dark Reading LIVE for two cybersecurity summits at Interop 2019. Learn from the industry's most knowledgeable IT security experts. Check out the Interop agenda here.

Dark Reading's Quick Hits delivers a brief synopsis and summary of the significance of breaking news events. For more information from the original source of the news item, please follow the link provided in this article. View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Oldest First  |  Newest First  |  Threaded View
RyanSepe
50%
50%
RyanSepe,
User Rank: Ninja
3/21/2019 | 10:14:27 AM
Bug Bounty
It's good to see bug bounty programs gaining traction. It is truly an advocation towards good will. It incentivises the discovery of issues and advocates that they be fixed instead of trying to use that information for nefarious purposes.
Mobile Banking Malware Up 50% in First Half of 2019
Kelly Sheridan, Staff Editor, Dark Reading,  1/17/2020
7 Tips for Infosec Pros Considering A Lateral Career Move
Kelly Sheridan, Staff Editor, Dark Reading,  1/21/2020
For Mismanaged SOCs, The Price Is Not Right
Kelly Sheridan, Staff Editor, Dark Reading,  1/22/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment:   It's a PEN test of our cloud security.
Current Issue
IT 2020: A Look Ahead
Are you ready for the critical changes that will occur in 2020? We've compiled editor insights from the best of our network (Dark Reading, Data Center Knowledge, InformationWeek, ITPro Today and Network Computing) to deliver to you a look at the trends, technologies, and threats that are emerging in the coming year. Download it today!
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-7245
PUBLISHED: 2020-01-23
Incorrect username validation in the registration processes of CTFd through 2.2.2 allows a remote attacker to take over an arbitrary account after initiating a password reset. This is related to register() and reset_password() in auth.py. To exploit the vulnerability, one must register with a userna...
CVE-2019-14885
PUBLISHED: 2020-01-23
A flaw was found in the JBoss EAP Vault system in all versions before 7.2.6.GA. Confidential information of the system property's security attribute value is revealed in the JBoss EAP log file when executing a JBoss CLI 'reload' command. This flaw can lead to the exposure of confidential information...
CVE-2019-17570
PUBLISHED: 2020-01-23
An untrusted deserialization was found in the org.apache.xmlrpc.parser.XmlRpcResponseParser:addResult method of Apache XML-RPC (aka ws-xmlrpc) library. A malicious XML-RPC server could target a XML-RPC client causing it to execute arbitrary code. Apache XML-RPC is no longer maintained and this issue...
CVE-2020-6007
PUBLISHED: 2020-01-23
Philips Hue Bridge model 2.X prior to and including version 1935144020 contains a Heap-based Buffer Overflow when handling a long ZCL string during the commissioning phase, resulting in a remote code execution.
CVE-2012-4606
PUBLISHED: 2020-01-23
Citrix XenServer 4.1, 6.0, 5.6 SP2, 5.6 Feature Pack 1, 5.6 Common Criteria, 5.6, 5.5, 5.0, and 5.0 Update 3 contains a Local Privilege Escalation Vulnerability which could allow local users with access to a guest operating system to gain elevated privileges.