Google Deepmind Reverb RPC Endpoint deserialization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Google Deepmind Reverb. Affected is an unknown function of the component RPC Endpoint. This manipulation causes deserialization. This vulnerability is tracked as CVE-2024-8375. The attack is restricted to local execution. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Google Deepmind Reverb (affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown functionality of the component RPC Endpoint. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

There exists a use after free vulnerability in Reverb. Reverb supports the VARIANT datatype, which is supposed to represent an arbitrary object in C++. When a tensor proto of type VARIANT is unpacked, memory is first allocated to store the entire tensor, and a ctor is called on each instance. Afterwards, Reverb copies the content in tensor_content to the previously mentioned pre-allocated memory, which results in the bytes in tensor_content overwriting the vtable pointers of all the objects which were previously allocated. Reverb exposes 2 relevant gRPC endpoints: InsertStream and SampleStream. The attacker can insert this stream into the server’s database, then when the client next calls SampleStream they will unpack the tensor into RAM, and when any method on that object is called (including its destructor) the attacker gains control of the Program Counter. We recommend upgrading past git commit  https://github.com/google-deepmind/reverb/commit/6a0dcf4c9e842b7f999912f792aaa6f6bd261a25

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2024-8375 since 09/02/2024. The exploitation appears to be difficult. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

Applying the patch 6a0dcf4c9e842b7f999912f792aaa6f6bd261a25 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

• Google Deepmind

Name

• Reverb

License

• free

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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