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


Title:       EGI SVG 'ADVISORY' [TLP:WHITE ] LOW risk vulnerability in dCache xrootd protocol implementation [EGI-SVG-2019-16022]  

Date:        2019-11-11
Updated:     2019-12-09 Fixed version in EGI UMD 4.9.1

Affected software and risk

LOW risk vulnerability concerning dCache 

Package : dCache 

A vulnerability in dCache Xrootd protocol implementation has been found which allows authenticated users to list 
directories outside of a restricted set configured by the service administrator. Accessing such directories or 
their contents is still constrained by their actual permissions: only the restriction to certain paths is not applied.

Actions required/recommended

Sites are recommended to update relevant components as soon as it is convenient.

**UPDATE 2019-12-09**

Sites may update from the dCache site [R 1] or from the EGI UMD.

Component installation information

Updates are available at from the dCache site [R 1] 

The official repository for the distribution of grid middleware for EGI sites is which contains the EGI Unified Middleware Distribution (UMD).
Sites using the EGI UMD 4 should see:

**UPDATE 2019-12-09**

dCache 5.2.10 is available in EGI UMD release 4.9.1 which does not contain this vulnerability.

Affected software details

Fixed versions are:-- 


Earlier versions supported versions - 4.2, 5.0, 5.1, 5.2, 6.0 are all vulnerable. 


** 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 2]  

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


[R 1]

[R 2]


This vulnerability was reported by Tigran Mkrtchyan from the dCache team. 

Yyyy-mm-dd  [EGI-SVG-2019-16022] 

2019-10-29 Vulnerability reported by Tigran Mkrtchyan 
2019-10-29 Acknowledgement from the EGI SVG to the reporter
2019-10-31 EGI SVG Risk Assessment completed
2019-10-31 Assessment by the EGI Software Vulnerability Group reported to the software providers 
2019-11-05 Updated packages available on the dCache site 
2019-11-11 Advisory sent to sites
2019-12-09 Version of dCache with this vulnerability fixed available in the EGI UMD - advisory updated.


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 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,