Vulnerability Information
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Vulnerability Title
Object deserialization in Reverb leading to RCE
Vulnerability Description
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
CVSS Information
N/A
Vulnerability Type
可信数据的反序列化
Vulnerability Title
Reverb 安全漏洞
Vulnerability Description
Reverb是Google DeepMind开源的一个高效且易于使用的数据存储和传输系统。 Reverb存在安全漏洞，该漏洞源于当解包类型为 VARIANT 的张量原型时，会将 tensor_content 中的字节覆盖之前分配的所有对象的 vtable 指针，导致释放后重用漏洞。
CVSS Information
N/A
Vulnerability Type
N/A