title: Out of Memory issue in ProtocolBuffers for cpp and python
description: A parsing vulnerability for the MessageSet type in the ProtocolBuffers versions prior to and including 3.16.1, 3.17.3, 3.18.2, 3.19.4, 3.20.1 and 3.21.5 for protobuf-cpp, and versions prior to and including 3.16.1, 3.17.3, 3.18.2, 3.19.4, 3.20.1 and 4.21.5 for protobuf-python can lead to out of memory failures. A specially crafted message with multiple key-value per elements creates parsing issues, and can lead to a Denial of Service against services receiving unsanitized input. We recommend upgrading to versions 3.18.3, 3.19.5, 3.20.2, 3.21.6 for protobuf-cpp and 3.18.3, 3.19.5, 3.20.2, 4.21.6 for protobuf-python. Versions for 3.16 and 3.17 are no longer updated.
problem types: CWE-1286: Improper Validation of Syntactic Correctness of Input
affected:
{
vendor: Google LLC
product: protobuf-cpp
versions:
version: unspecified, lessThanOrEqual: 3.16.1, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.17.3, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.18.2, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.19.4, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.20.1, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.21.5, status: affected, versionType: custom
}
{
vendor: Google LLC
product: protobuf-python
versions:
version: unspecified, lessThanOrEqual: 3.16.1, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.17.3, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.18.2, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.19.4, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 3.20.1, status: affected, versionType: custom
version: unspecified, lessThanOrEqual: 4.21.5, status: affected, versionType: custom
}
metrics:
other: [
type: unknown
content: {'attackComplexity': 'LOW', 'attackVector': 'ADJACENT', 'availabilityImpact': 'HIGH', 'baseScore': 5.7, 'baseSeverity': 'MEDIUM', 'confidentialityImpact': 'NONE', 'integrityImpact': 'NONE', 'privilegesRequired': 'LOW', 'scope': 'UNCHANGED', 'userInteraction': 'NONE', 'vectorString': 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}
]