Issue Description

Google TensorFlow 1.7.x and earlier is affected by a Buffer Overflow vulnerability. The type of exploitation is context-dependent. The block size in meta file might contain a large int64 value which causes an integer overflow upon addition. Subsequent code using n as index may cause an out-of-bounds read.

Impact

A maliciously crafted meta checkpoint could be used to cause the TensorFlow process to perform an out of bounds read on in process memory.

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-7575
• https://github.com/tensorflow/tensorflow/blob/master/tensorflow/security/advisory/tfsa-2018-004.md
• tensorflow/tensorflow@d107fee