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GHSA-9h84-qmv7-982p
No affected components available
A Helm contributor discovered that it was possible to craft a JSON Schema file in a manner which could cause Helm to use all available memory and have an out of memory (OOM) termination.
Impact
A malicious chart can point $ref in values.schema.json to a device (e.g. /dev/*) or other problem file which could cause Helm to use all available memory and have an out of memory (OOM) termination.
Patches
This issue has been resolved in Helm v3.18.5.
Workarounds
Make sure that all Helm charts that are being loaded into Helm doesn't have any reference of $ref pointing to /dev/zero.
References
Helm's security policy is spelled out in detail in our SECURITY document.
Credits
Disclosed by Jakub Ciolek at AlphaSense.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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