CVE-2023-37261

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Summary

CVECVE-2023-37261
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-07 21:15:00 UTC
Updated2023-07-08 10:25:00 UTC
DescriptionOpenComputers is a Minecraft mod that adds programmable computers and robots to the game. This issue affects every version of OpenComputers with the Internet Card feature enabled; that is, OpenComputers 1.2.0 until 1.8.3 in their most common, default configurations. If the OpenComputers mod is installed as part of a Minecraft server hosted on a popular cloud hosting provider, such as AWS, GCP and Azure, those metadata services' API endpoints are not forbidden (aka "blacklisted") by default. As such, any player can gain access to sensitive information exposed via those metadata servers, potentially allowing them to pivot or privilege escalate into the hosting provider. In addition, IPv6 addresses are not correctly filtered at all, allowing broader access into the local IPv6 network. This can allow a player on a server using an OpenComputers computer to access parts of the private IPv4 address space, as well as the whole IPv6 address space, in order to retrieve sensitive information. OpenComputers v1.8.3 for Minecraft 1.7.10 and 1.12.2 contains a patch for this issue. Some workarounds are also available. One may disable the Internet Card feature completely. If using OpenComputers 1.3.0 or above, using the allow list (`opencomputers.internet.whitelist` option) will prohibit connections to any IP addresses and/or domains not listed; or one may add entries to the block list (`opencomputers.internet.blacklist` option). More information about mitigations is available in the GitHub Security Advisory.

Risk And Classification

Problem Types: CWE-918

References

ReferenceSourceLinkTags
SSRF to Cloud (AWS, GCP, Azure) Services Metadata Services (IMDS) not Blocked by Default · Advisory · cc-tweaked/CC-Tweaked · GitHub MISC github.com
github.com/MightyPirates/OpenComputers/blob/5b2ba76a4c242b369b9b6ac6196f... MISC github.com
[Real world security] Http connections possible to local server network · Issue #2365 · MightyPirates/OpenComputers · GitHub MISC github.com
Release [MC1.12.2] [Forge] v1.8.3 · MightyPirates/OpenComputers · GitHub MISC github.com
github.com/MightyPirates/OpenComputers/blob/5b2ba76a4c242b369b9b6ac6196f... MISC github.com
SSRF to cloud (AWS, GCP, Azure) service metadata services (IMDS) and local IPv6 addresses not blocked by default · Advisory · MightyPirates/OpenComputers · GitHub MISC github.com
Rework Internet Card filtering system. · MightyPirates/OpenComputers@d13c015 · GitHub MISC github.com
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