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Vulnerability · Published Nov 5, 2021 · Assigned by GitHub_M

CVE-2021-41227Arbitrary memory read in `ImmutableConst`

Medium 6.6

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 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.6Medium
Exploit odds (30 days)0.2%top 85.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

TensorFlow is an open source platform for machine learning. In affected versions the `ImmutableConst` operation in TensorFlow can be tricked into reading arbitrary memory contents. This is because the `tstring` TensorFlow string class has a special case for memory mapped strings but the operation itself does not offer any support for this datatype. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPItensorflow2.4.4, 2.5.2, 2.6.1, 2.7.0PYSEC-2021-419
PyPItensorflow2.6.1GHSA-j8c8-67vp-6mx7
PyPItensorflow2.5.2GHSA-j8c8-67vp-6mx7
PyPItensorflow2.4.4GHSA-j8c8-67vp-6mx7
PyPItensorflow-cpu2.5.2GHSA-j8c8-67vp-6mx7
PyPItensorflow-cpu2.4.4, 2.5.2, 2.6.1, 2.7.0PYSEC-2021-636
PyPItensorflow-cpu2.6.1GHSA-j8c8-67vp-6mx7
PyPItensorflow-cpu2.4.4GHSA-j8c8-67vp-6mx7
PyPItensorflow-gpu2.4.4, 2.5.2, 2.6.1, 2.7.0PYSEC-2021-834
PyPItensorflow-gpu2.6.1GHSA-j8c8-67vp-6mx7
PyPItensorflow-gpu2.5.2GHSA-j8c8-67vp-6mx7
PyPItensorflow-gpu2.4.4GHSA-j8c8-67vp-6mx7

Affected products (as reported)

VendorProductVersions
tensorflow tensorflow >= 2.6.0, < 2.6.1>= 2.5.0, < 2.5.2< 2.4.4

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

References