Vulnerability · Published Dec 10, 2020 · Assigned by GitHub_M
CVE-2020-26271Heap out of bounds access in MakeEdge in TensorFlow
Medium 4.4
In plain English
A medium-severity out-of-bounds read in tensorflow from tensorflow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | tensorflow | 2.1.3 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow | 2.2.2 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow | 2.3.2 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow | 1.15.5 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow | 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2 | PYSEC-2020-257 |
| PyPI | tensorflow | 2.0.4 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-cpu | 2.3.2 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-cpu | 1.15.5 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-cpu | 2.0.4 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-cpu | 2.1.3 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-cpu | 2.2.2 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-cpu | 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2 | PYSEC-2020-302 |
| PyPI | tensorflow-gpu | 2.1.3 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-gpu | 2.2.2 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-gpu | 2.3.2 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-gpu | 1.15.5 | GHSA-q263-fvxm-m5mw |
| PyPI | tensorflow-gpu | 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2 | PYSEC-2020-337 |
| PyPI | tensorflow-gpu | 2.0.4 | GHSA-q263-fvxm-m5mw |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tensorflow | tensorflow | < 1.15.5>= 2.0.0, < 2.0.4>= 2.1.0, < 2.1.3>= 2.2.0, < 2.2.2>= 2.3.0, < 2.3.2 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L