CVE-2020-26271 Information

Description

In affected versions of TensorFlow under certain cases loading a saved model can result in accessing uninitialized memory while building the computation graph. The MakeEdge function creates an edge between one output tensor of the src node (given by output_index) and the input slot of the dst node (given by input_index). This is only possible if the types of the tensors on both sides coincide so the function begins by obtaining the corresponding DataType values and comparing these for equality. However there is no check that the indices point to inside of the arrays they index into. Thus this can result in accessing data out of bounds of the corresponding heap allocated arrays. In most scenarios this can manifest as unitialized data access but if the index points far away from the boundaries of the arrays this can be used to leak addresses from the library. This is fixed in versions 1.15.5 2.0.4 2.1.3 2.2.2 2.3.2 and 2.4.0.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Reference

https://github.com/tensorflow/tensorflow/security/advisories/GHSA-q263-fvxm-m5mw https://github.com/tensorflow/tensorflow/commit/0cc38aaa4064fd9e79101994ce9872c6d91f816b

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

3.3