OSC ondemand up to 4.0.8 ood_portal.yml custom_location_directives insufficiently protected credentials

Summaryinfo

A vulnerability was found in OSC ondemand up to 4.0.8 and classified as critical. Affected by this issue is the function custom_location_directives of the file ood_portal.yml. Executing a manipulation can lead to insufficiently protected credentials. This vulnerability is handled as CVE-2025-66029. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in OSC ondemand up to 4.0.8. This vulnerability affects the function custom_location_directives of the file ood_portal.yml. The manipulation with an unknown input leads to a insufficiently protected credentials vulnerability. The CWE definition for the vulnerability is CWE-522. The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Open OnDemand provides remote web access to supercomputers. In versions 4.0.8 and prior, the Apache proxy allows sensitive headers to be passed to origin servers. This means malicious users can create an origin server on a compute node that record these headers when unsuspecting users connect to it. Maintainers anticipate a patch in a 4.1 release. Workarounds exist for 4.0.x versions. Using `custom_location_directives` in `ood_portal.yml` in version 4.0.x (not available for versions below 4.0) centers can unset and or edit these headers. Note that `OIDCPassClaimsAs both` is the default and centers can set `OIDCPassClaimsAs ` to `none` or `environment` to stop passing these headers to the client. Centers that have an OIDC provider with the `OIDCPassClaimsAs` with `none` or `environment` settings can adjust the settings using guidance provided in GHSA-2cwp-8g29-9q32 to unset the mod_auth_openidc_session cookies.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-66029 since 11/21/2025. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1552.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-204011). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• OSC

Name

• ondemand

Version

• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.0.6
• 4.0.7
• 4.0.8

Website

• Product: https://github.com/OSC/ondemand/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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