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.

Perimeter

Fedora, Red Hat Servers Compromised

Popular Linux implementation will require changes in signing keys

Fedora Project leader Paul Frields ended speculation on Friday and revealed that the popular Linux implementation's servers have been breached.

"Last week, we discovered that some Fedora servers were illegally accessed," Frields said in a message to Fedora users about the security breach on Friday. "The intrusion into the servers was quickly discovered, and the servers were taken offline."

Fedora's servers have experienced some downtime in the past two weeks, and Frields had previously asked users not to download any new versions of the operating system, leading some observers to speculate that a security breach had occurred. (See Linux Users Speculate Over Fedora Outage.)

One of the compromised Fedora servers was a system used for signing Fedora packages, Frields said. "However, based on our efforts, we have high confidence that the intruder was not able to capture the passphrase used to secure the Fedora package signing key. Based on our review to date, the passphrase was not used during the time of the intrusion on the system, and the passphrase is not stored on any of the Fedora servers."

However, because Fedora packages are distributed via multiple third-party mirrors and repositories, the Fedora project has decided to convert to new Fedora signing keys, Frields said. "This may require affirmative steps from every Fedora system owner or administrator," he warned.

Frields said there is "little risk" to Fedora users who want to install or upgrade signed Fedora packages. Our previous warnings against further package updates were based on an abundance of caution, out of respect for our users," he said. "This is also why we are proceeding with plans to change the Fedora package signing key."

While Frields was issuing his warning, Red Hat also issued its own advisory on a security breach. "Last week, Red Hat detected an intrusion on certain of its computer systems and took immediate action," the advisory states.

"While the investigation into the intrusion is on-going, our initial focus was to review and test the distribution channel we use with our customers, Red Hat Network(RHN) and its associated security measures," the company said. "Based on these efforts, we remain highly confident that our systems and processes prevented the intrusion from compromising RHN or the content distributed via RHN, and accordingly believe that customers who keep their systems updated using Red Hat Network are not at risk."

The advisory is mainly for "those who may obtain Red Hat binary packages via channels other than those of official Red Hat subscribers," Red Hat said.

"It is important to note that the effects of the intrusion on Fedora and Red Hat are *not* the same," Frields wrote. "Accordingly, the Fedora package signing key is not connected to, and is different from, the one used to sign Red Hat Enterprise Linux packages."

Frields said the Fedora Project will contact users soon to let them know how to handle they change in signing keys.

— Tim Wilson, Site Editor, Dark Reading

Tim Wilson is Editor in Chief and co-founder of Dark Reading.com, UBM Tech's online community for information security professionals. He is responsible for managing the site, assigning and editing content, and writing breaking news stories. Wilson has been recognized as one ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Oldest First  |  Newest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 9/25/2020
Hacking Yourself: Marie Moe and Pacemaker Security
Gary McGraw Ph.D., Co-founder Berryville Institute of Machine Learning,  9/21/2020
Startup Aims to Map and Track All the IT and Security Things
Kelly Jackson Higgins, Executive Editor at Dark Reading,  9/22/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-15208
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, when determining the common dimension size of two tensors, TFLite uses a `DCHECK` which is no-op outside of debug compilation modes. Since the function always returns the dimension of the first tensor, malicious attackers can ...
CVE-2020-15209
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, a crafted TFLite model can force a node to have as input a tensor backed by a `nullptr` buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one....
CVE-2020-15210
PUBLISHED: 2020-09-25
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, if a TFLite saved model uses the same tensor as both input and output of an operator, then, depending on the operator, we can observe a segmentation fault or just memory corruption. We have patched the issue in d58c96946b and ...
CVE-2020-15211
PUBLISHED: 2020-09-25
In TensorFlow Lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, saved models in the flatbuffer format use a double indexing scheme: a model has a set of subgraphs, each subgraph has a set of operators and each operator has a set of input/output tensors. The flatbuffer format uses indices f...
CVE-2020-15212
PUBLISHED: 2020-09-25
In TensorFlow Lite before versions 2.2.1 and 2.3.1, models using segment sum can trigger writes outside of bounds of heap allocated buffers by inserting negative elements in the segment ids tensor. Users having access to `segment_ids_data` can alter `output_index` and then write to outside of `outpu...