Home/CVE/TensorFlow is an end-to-end open source platform for machine learning. In eager mode (default in TF 2.0 and later), sess
CVE

CVE-2021-29518

TensorFlow is an end-to-end open source platform for machine learning. In eager mode (default in TF 2.0 and later), sess

TensorFlow is an end-to-end open source platform for machine learning. In eager mode (default in TF 2.0 and later), session operations are invalid. However, users could still call the raw ops associated with them and trigger a null pointer dereference.

The implementation(https://github.com/tensorflow/tensorflow/blob/eebb96c2830d48597d055d247c0e9aebaea94cd5/tensorflow/core/kernels/session_ops.cc#L104) dereferences the session state pointer without checking if it is valid. Thus, in eager mode, ctx-session_state() is nullptr and the call of the member function is undefined behavior. The fix will be included in TensorFlow 2.5.0.

We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.

LOW · CVSS 2.5 EPSS 9e-05
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

4
google tensorflow< 2.1.4
google tensorflow>= 2.2.0 and < 2.2.3
google tensorflow>= 2.3.0 and < 2.3.3
google tensorflow>= 2.4.0 and < 2.4.2
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI tensorflow LOW fixed in 2.1.4
PyPI tensorflow-cpu LOW fixed in 2.1.4
PyPI tensorflow-gpu LOW fixed in 2.1.4
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-62gx-355r-9fhggithub.com
▣

Scoring & Timeline

2.5
LOW · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 May 2021 · 08:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/tensorflow/tensorflow/commit/ff70c47a396ef1e3cb73c90513da4f5cb71bebbaPatchThird Party Advisory
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