SVG:Advisory-SVG-2017-12381

Title: EGI SVG Advisory [TLP:WHITE] Up to 'High' risk - Singularity container escape vulnerability [EGI-SVG-2017-12381]

Date: 2017-02-17 Updated:

Affected software and risk

==============

Up to HIGH risk vulnerability concerning Singularity container escape.

Package : Singularity CVE ID  : N/A Bug ID  : N/A

If unprivileged users are allowed to launch their own containers through Singularity, it would be possible for a malicious user to create and manipulate specifically crafted raw devices within containers they own, and then gain access outside their own container.

Actions required/recommended

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Sites running Singularity must update as soon as possible.

Affected software details

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This is fixed in Singularity Version 2.2.1

Earlier versions are vulnerable.

More information

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See [R 1]

We rate this as 'up to High risk' as the actual risk depends on the type of use and local site configuration.

When singularity containers are run via batch systems, which we think is likely to be a typical implementation in EGI, the vulnerability cannot be exploited.

The configurations that allow individual users to upload and execute singularity containers are vulnerable and must be updated urgently.

Component installation information

======================

Fixed version is available from [R 1]

TLP and URL

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• • WHITE information - Unlimited distribution - see https://wiki.egi.eu/wiki/EGI_CSIRT:TLP for distribution restrictions**

URL: https://wiki.egi.eu/wiki/SVG:Advisory-SVG-2017-12381

Minor updates may be made without re-distribution to the sites

Comments

==

Comments or questions should be sent to svg-rat at mailman.egi.eu

If you find or become aware of a vulnerability which is relevant to EGI you may report it by e-mail to

report-vulnerability at egi.eu

the EGI Software Vulnerability Group will take a look according to the procedure defined in [R 2]

References

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[R 1] https://github.com/singularityware/singularity/releases/tag/2.2.1

[R 2] https://documents.egi.eu/public/ShowDocument?docid=2538

Credit

==

This vulnerability was discovered by Mattias Wadenstein

And

SVG was alerted to this vulnerability by Jeny Teheran from Fermilab.

Testing also carried out by Barbara Krasovec

Timeline

==

Yyyy-mm-dd [EGI-SVG-2017-12381]

2017-02-03 SVG alerted to this issue by Jeny Teheran. 2017-02-06 Acknowledgement from the EGI SVG to the reporter 2017-02-06 Investigation of vulnerability and relevance to EGI carried out,

          including testing by Barbara Krasovec

2017-02-15 Singularity 2.2.1 security release 2017-02-15 EGI SVG meeting, agreed on 'Up to High' and advisory/alert necessary 2017-02-17 Advisory/Alert sent to sites

Context

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This advisory has been prepared as part of the effort to fulfil EGI SVG's purpose "To minimize the risk to the EGI infrastructure arising from software vulnerabilities"

The risk is that assessed by the group, according to the EGI SVG issue handling procedure [R 2] in the context of how the software is used in the EGI infrastructure. It is the opinion of the group, we do not guarantee it to be correct. The risk may also be higher or lower in other deployments depending on how the software is used.

Others may re-use this information provided they:-

1) Respect the provided TLP classification

2) Credit the EGI https://www.egi.eu/ Software Vulnerability Group

On behalf of the EGI SVG,