Vulnerabilities affecting this package (1)
| Vulnerability |
Summary |
Fixed by |
VCID-hwx9-7pf9-ryce
Aliases:
CVE-2025-4565
GHSA-8qvm-5x2c-j2w7
|
protobuf-python has a potential Denial of Service issue
### Summary
Any project that uses Protobuf pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of **recursive groups**, **recursive messages** or **a series of [`SGROUP`](https://protobuf.dev/programming-guides/encoding/#groups) tags** can be corrupted by exceeding the Python recursion limit.
Reporter: Alexis Challande, Trail of Bits Ecosystem Security Team
[ecosystem@trailofbits.com](mailto:ecosystem@trailofbits.com)
Affected versions: This issue only affects the [pure-Python implementation](https://github.com/protocolbuffers/protobuf/tree/main/python#implementation-backends) of protobuf-python backend. This is the implementation when `PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python` environment variable is set or the default when protobuf is used from Bazel or pure-Python PyPi wheels. CPython PyPi wheels do not use pure-Python by default.
This is a Python variant of a [previous issue affecting protobuf-java](https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-735f-pc8j-v9w8).
### Severity
This is a potential Denial of Service. Parsing nested protobuf data creates unbounded recursions that can be abused by an attacker.
### Proof of Concept
For reproduction details, please refer to the unit tests [decoder_test.py](https://github.com/protocolbuffers/protobuf/blob/main/python/google/protobuf/internal/decoder_test.py#L87-L98) and [message_test](https://github.com/protocolbuffers/protobuf/blob/main/python/google/protobuf/internal/message_test.py#L1436-L1478)
### Remediation and Mitigation
A mitigation is available now. Please update to the latest available versions of the following packages:
* protobuf-python(4.25.8, 5.29.5, 6.31.1)
|
There are no reported fixed by versions.
|
Vulnerabilities fixed by this package (0)
| Vulnerability |
Summary |
Aliases |
|
This package is not known to fix vulnerabilities.
|