8. Known Issues

8.1. AMC#001: API Documentation Curl Examples Not Working

Since ASGARD 2.12.8 the API documentation is not showing the API key in example queries as it should and did.

8.1.1. AMC#001: Workaround

You need to manually add -H 'Authorization: <your-API-key>' to your queries.

Example with API endpoint /playbooks/search:

Non-working curl example:

user@host:~$ curl -X 'GET' \
  'https://asgard.local:8443/api/v1/playbooks/search?limit=1' \
  -H 'accept: application/json'

Working curl example:

user@host:~$ curl -X 'GET' \
  'https://asgard.local:8443/api/v1/playbooks/search?limit=1' \
  -H 'accept: application/json' \
  -H 'Authorization: <your-API-key>'

You also need the --insecure curl flag, if you are using the self-signed certificate that ASGARD shipped with.

8.1.2. AMC#001: Status

Resolved in ASGARD 2.13.5+

8.2. AMC#002: Aurora False Positive Filters Cleared After Saving

If the global Aurora false positive filter at Service Control > Aurora > False Positive Filters is used, the text box is empty/cleared after saving and refreshing the page.

8.2.1. AMC#002: Workaround

If the false positive tuning you want to achieve is only affecting one rule, the best place to tune it is a single rule false positive tuning at Service Control > Sigma > Rules and choosing the "Edit false positives filters of this rule" action.

If you need global false positive filter, you can edit the file /var/lib/nextron/asgard2/products/aurora-config/false-positives.cfg directly via the ASGARD command line. In order for the changes to take effect it is important NOT to click the Service Control > Aurora > False Positive Filters > Save button.

Instead go to Service Control > Aurora > Configurations and edit the configuration of the assets that need the false positive filter. To do so just open the configuration using the edit action and saving without any modifications using the "Save Configuration and Restart Aurora Agents" button. This will use the false positive filter defined in the file via CLI and restarts the assets to use the new configuration.

8.2.2. AMC#002: Status

Open. Will be fixed in the next release.

8.3. AMC#003: Error on newly installed Management Center

You just installed an ASGARD Management Center and get error messages such as

Error: Something went wrong
c is null

or

Error: Something went wrong
Cannot read properties of null (reading 'forEach')

This happens if you want to initiate THOR scans or access THOR scan settings before ASGARD was able to download the THOR packages from our update servers.

8.3.1. AMC#003: Workaround

Make sure ASGARD is able to access our update servers (see System Status: Connectivity Test or System Status > Diagnostics and that you have imported a valid license (see Licensing).

You can either wait for ASGARD to download the THOR packages automatically (check at Updates > THOR and Signatures) or initiate a download of THOR packages and signatures manually by clicking the "Manually Check for Updates" button at Updates > THOR and Signatures.

8.3.2. AMC#003: Status

Open.

8.4. AMC#004: RPM Packages do not have a compatible architecture

Some Linux systems return this error message when installing the RPM packages of the ASGARD agents.

Depsolve Error occured: \n Problem: conflicting requests\n  - package asgard2-agent-1-1.0.0.amd64 does not have a compatible architecture.

The issue is known and can be ignored. The installation completes successfull regardless of this error message.

8.4.1. AMC#004: Workaround 1

No workaround required. Regardless of the message the package installation completes successfully.

You can avoid the error messages using this command:

user@host:~$ sudo yum install --forcearch amd64 ./asgard2-agent-linux-amd64.rpm

For an unattended installation (no user interaction) use:

user@host:~$ sudo yum install -y --forcearch amd64 ./asgard2-agent-linux-amd64.rpm

8.4.2. AMC#004: Workaround 2

You can build a new RPM package and use it for automated installations.

Log into the Asgard server which should be used by the clients to connect to and execute the following steps:

nextron@asgard:~$ sudo -u asgard2 -s # Open a shell with the access rights of the asgard2 user
asgard2@asgard:~$ rpmbuild --target x86_64 --buildroot /var/lib/nextron/asgard2/templates/rpm/BUILDROOT/x86_64 -bb /var/lib/nextron/asgard2/templates/rpm/SPECS/asgard2-agent-amd64.spec

Use the following file instead of the RPM from the Agent Download section in the Asgard UI:

/var/lib/nextron/asgard2/templates/rpm/x86_64/asgard2-agent-1-1.0.0.x86_64.rpm

When using scp to transfer the file from the server, you will need to copy the file to a directoy that is accessible by the nextron user. You also need to change the file permissions. One possibility to achive this is to use the following commands:

asgard2@asgard:~$ exit # close the session of the asgard2 user if still open
nextron@asgard:~$ sudo cp /var/lib/nextron/asgard2/templates/rpm/x86_64/asgard2-agent-1-1.0.0.x86_64.rpm /home/nextron/
nextron@asgard:~$ sudo chown nextron:nextron /home/nextron/asgard2-agent-1-1.0.0.x86_64.rpm

The resulting RPM should no longer cause the described "unsupported architecture" error message when it is used with yum or dnf.

8.4.3. AMC#004: Workaround 3

There are rare cases where the package installation should be automated and the command line flags are not an option. In this cases it is possible to perform the ASGARD agent installation manually. This requires to collect some files from ASGARD and move them to the asset that should be connected.

# For 64-bit systems
/var/lib/nextron/asgard2/templates/linux/asgard2-agent-amd64
/var/lib/nextron/asgard2/templates/linux/client-amd64

# For 32-bit systems
/var/lib/nextron/asgard2/templates/linux/asgard2-agent-386
/var/lib/nextron/asgard2/templates/linux/client-386

# For all systems
/etc/nextron/asgard2/ca.pem
/etc/nextron/asgard2/client.yaml

These files have to be located on the target asset as follows

# Preparation if it is a first time installation
mkdir -p /var/lib/asgard2-agent/

# For 64-bit systems
mv asgard2-agent-amd64 /usr/sbin/asgard2-agent-service
mv client-amd64 /var/lib/asgard2-agent/asgard2-agent

# For 32-bit systems
mv asgard2-agent-386 /usr/sbin/asgard2-agent-service
mv client-386 /var/lib/asgard2-agent/asgard2-agent

# For all systems
mv ca.pem /var/lib/asgard2-agent/ca.pem
mv client.yaml /var/lib/asgard2-agent/asgard2-agent.yaml

# Make sure access rights in the file system are secure
chown -R root:root /var/lib/asgard2-agent
chmod -R g-rwx /var/lib/asgard2-agent
chmod -R o-rwx /var/lib/asgard2-agent

Afterwards the installation is done by running:

user@host:~$ sudo /var/lib/asgard2-agent/asgard2-agent -install

To uninstall the ASGARD agent without using the RPM package the following steps can be used:

user@host:~# sudo /var/lib/asgard2-agent/asgard2-agent -uninstall
user@host:~# sudo rm /usr/sbin/asgard2-agent-service
user@host:~# sudo rm -Rf /var/lib/asgard2-agent/

8.4.4. AMC#004: Status

Under investigation. We are planning to provide fixes but have to test if the fix would cause problems with older installations. (upgrades, legacy issues)

8.5. AMC#005: Basename Missing Operand after SSH Login

After logging into ASGARD Management Center via SSH right after installing the base system, the following message can appear:

basename: missing operand
Try 'basename --help' for more information

It is caused by a unhandled condition in the MOTD (message of the day) script that evaluates the version of the scanners and signatures. After installing ASGARD it takes some minutes to retrieve and install all scanners from the update servers.

The issue is known and can be ignored.

8.5.1. AMC#005: Workaround

No workaround required. The issue solves itself after the download of the scanner and signature packages.

8.5.2. AMC#005: Status

Fixed in next ASGARD version.

8.6. AMC#006: Nested LDAP Groups not working

Using nested groups in your LDAP/AD will result in no users because the query will fail.

8.6.1. AMC#006: Workaround

Change your LDAP GroupFilter to the following:

(&(objectCategory=group)(objectClass=group)(member:1.2.840.113556.1.4.1941:=%s))

8.6.2. AMC#006: Status

Fixed in next ASGARD version.