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
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest 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.
COVID-19: Latest Security News & Commentary
Dark Reading Staff 7/1/2020
Ripple20 Threatens Increasingly Connected Medical Devices
Kelly Sheridan, Staff Editor, Dark Reading,  6/30/2020
DDoS Attacks Jump 542% from Q4 2019 to Q1 2020
Dark Reading Staff 6/30/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
The Threat from the Internet--and What Your Organization Can Do About It
This report describes some of the latest attacks and threats emanating from the Internet, as well as advice and tips on how your organization can mitigate those threats before they affect your business. Download it today!
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-15478
PUBLISHED: 2020-07-01
The Journal theme before 3.1.0 for OpenCart allows exposure of sensitive data via SQL errors.
CVE-2020-6261
PUBLISHED: 2020-07-01
SAP Solution Manager (Trace Analysis), version 7.20, allows an attacker to perform a log injection into the trace file, due to Incomplete XML Validation. The readability of the trace file is impaired.
CVE-2020-15471
PUBLISHED: 2020-07-01
In nDPI through 3.2, the packet parsing code is vulnerable to a heap-based buffer over-read in ndpi_parse_packet_line_info in lib/ndpi_main.c.
CVE-2020-15472
PUBLISHED: 2020-07-01
In nDPI through 3.2, the H.323 dissector is vulnerable to a heap-based buffer over-read in ndpi_search_h323 in lib/protocols/h323.c, as demonstrated by a payload packet length that is too short.
CVE-2020-15473
PUBLISHED: 2020-07-01
In nDPI through 3.2, the OpenVPN dissector is vulnerable to a heap-based buffer over-read in ndpi_search_openvpn in lib/protocols/openvpn.c.