Protobuf MessageSet OOM DoS before 3.18.3 (cpp/python)
CVE-2022-1941 Published on September 22, 2022

Out of Memory issue in ProtocolBuffers for cpp and python
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 Versions for 3.16 and 3.17 are no longer updated.

Github Repository Vendor Advisory Vendor Advisory NVD

Vulnerability Analysis

CVE-2022-1941 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

Improper Validation of Syntactic Correctness of Input

The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax.


Products Associated with CVE-2022-1941

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2022-1941 are published in these products:

Google Protobuf Cpp
 
Google Protobuf Python
 
Canonical Ubuntu Linux
 
Fedora Project Fedora
 
Debian Linux
 
Google Protobuf
 

Affected Versions

Google LLC protobuf-cpp: Google LLC protobuf-python: google protobuf-cpp: google protobuf-python:

Vulnerable Packages

The following package name and versions may be associated with CVE-2022-1941

Package Manager Vulnerable Package Versions Fixed In
pip protobuf >= 4.0.0, < 4.21.6 4.21.6
pip protobuf >= 3.20.0, < 3.20.2 3.20.2
pip protobuf >= 3.19.0, < 3.19.5 3.19.5
pip protobuf < 3.18.3 3.18.3

Exploit Probability

EPSS
0.12%
Percentile
31.47%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.