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Title:       EGI SVG 'ADVISORY' [TLP:WHITE] CRITICAL risk - 2 HTCondor Vulnerabilities affecting a limited number of versions.  

Date:        2021-01-15
Updated:     2021-03-22

Affected software and risk

2 CRITICAL risk vulnerabilities concerning HTCondor

Package : HTCondor 

2 vulnerabilities have been found concerning HTCondor, affecting a limited number of versions. 
One may allow any authenticated user to impersonate any other user on the Condor system, and potentially 
reconfigure the HTCondor daemons.  The other may allow any authenticated user to  overwrite any file. 

Actions required/recommended

Any site running HTCondor versions 8.9.2 through 8.9.10 should consider taking action.

There are 3 options, install the 8.8.X stable series, update prior to the public release using the instructions below, 
or carry out the mitigation below until the fix is released publicly. 

Releases 8.8.X (STABLE SERIES) are NOT vulnerable.


From the HTCondor team:--

For the impersonation vulnerability affecting HTCondor 8.9.2 through 8.9.10 (inclusive):--

If you do not need to use IDTOKENS, you can disable that authentication method by specifying a list of authentication mechanisms that does not include it. 

On Linux, you would want to set, e.g., (removing any other methods you did not want to use): 

On Windows, you would want to set, e.g., (removing any other methods you did not want to use): 

You should also check your configuration for other places you may have explicitly set the list of methods: 
condor_config_val -dump AUTHENTICATION_METHODS
After making any changes, you will need to run 

For the File overwrite Vulnerability:--

Do not enable the condor_credd if you are not depending on it. 

Component installation information

From the HTCondor team:--

If you decide to install v8.9.11 ahead of the public release on January 27, you will need to add an additional repository to your system as detailed below.

After January 27, the v8.9.11 release will be in the usual public HTCondor repositories, so you can upgrade in your usual manner.

Use the repo that matches your system:

    (cd /etc/yum.repos.d; wget "repo URL")

Enterprise Linux 7:

Enterprise Linux 8:

Amazon Linux 2:

If you are installing on a Debian/Ubuntu use the security repository in addition to the regular repository.

Use the repo that matches your system:

    (cd /etc/apt/sources.list.d; wget "repo URL")

Debian 9 (stretch):

Debian 10 (buster):

Ubuntu 16 (xenial):

Ubuntu 18 (bionic):

Ubuntu 20 (focal):

Tarballs can be picked up at:

Affected software details

Impersonation vulnerability in HTCondor 8.9.2 through 8.9.10 (inclusive)

File overwrite vulnerability in HTCondor 8.9.7 through 8.9.10 (inclusive)

Both these issues are fixed in HTCondor version 8.9.11.

Releases 8.8.X STABLE SERIES are NOT vulnerable.

More information

These vulnerabilities are NOT publicly known about and the HTCondor team is not aware of any site where either have been exploited yet. 


** 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 1]  

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


[R 1]


SVG was alerted to this vulnerability by Zach Miller from the HTCondor Team 

Yyyy-mm-dd  [EGI-SVG-2021-17030] 

2021-01-13 SVG alerted to this issue by Zach Miller from the HTCondor Team.
2021-01-14 Acknowledgement from the EGI SVG to the reporter
2021-01-14 EGI SVG Risk Assessment completed
2021-01-15 Advisory sent to sites
2021-03-22 Advisory placed on SVG Wiki


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 1]  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.   

This advisory is subject to the Creative commons licence and 
the EGI Software Vulnerability Group must be credited. 

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,