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Main page Software Security Checklist Issue Handling Advisories Notes On Risk Advisory Template More


Title:       EGI SVG 'ALERT'[TLP:WHITE] Docker symlink-race attack CVE-2018-15664 CVE [EGI-SVG-CVE-2018-15664] 

Date:        2019-05-29
Updated:     2019-09-16  Redhat released a fix in July 

Affected software and risk

Vulnerability concerning Docker

Package : Docker
CVE ID  : CVE-2018-15644

Docker has been found to be vulnerable to a symlink-race attack.   Some information on this has been released 
publicly [R 1] [R 2] but SVG is still investigating the implications.

Actions required/recommended

Sites or anyone in the EGI community running Docker should be ready to patch or take other mitigating action 
when a patch or mitigation is available.

Sites failing to act and/or failing to respond to requests from the EGI CSIRT team risk site suspension. 

Component installation information


RedHat has produced a fix, see [R 4]

For ubuntu information  see [R 5]

For Debian see [R 6] 


None defined yet. 

More information

See [R 1], [R 2] 

SVG will provide an update when action is recommended.  

SVG has assessed the potential impact of the vulnerability and concluded that affected hosts would be vulnerable
 only if they allow unprivileged users to launch their own containers through a Docker service.  
That is, Worker Nodes that happen to be Docker containers themselves would, for example, not be vulnerable.

Although investigations are still ongoing, given the public attention for this issue we are sending this Alert.

**UPDATE 2019-09-16 ** Issue fixed, advisory updated. 


** WHITE information - Unlimited distribution 
  - see for distribution restrictions***                       

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


Comments or questions should be sent to svg-rat  at

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

report-vulnerability at
the EGI Software Vulnerability Group will take a look according to the procedure defined in [R 3]  

Note that this is undergoing revision to fully handle vulnerabilities in the EOSC-hub era. 


[R 1]

[R 2]

[R 3]

[R 4]

[R 5] 

[R 6]


SVG was alerted to this vulnerability by Barbara Krasovec

Yyyy-mm-dd  [EGI-SVG-CVE-2018-15664]] 

2019-05-28 SVG alerted to this issue by Barbara Krasovec
2019-05-28 Acknowledgement from the EGI SVG to the reporter
2019-05-28 Some discussions and investigations carried out by SVG.
2019-05-29 'Alert' sent to sites
2019-09-16 Updated as from checking through found that the issue has been fixed by various software providers.


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 3]  
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 Software Vulnerability Group

Note that the SVG issue handling procedure is currently under review, to take account of the increasing 
inhomogeneity of the EGI infrastructure and the services in the EOSC-hub catalogue.

On behalf of the EGI SVG,