EUVD-2025-18401
GHSA-8qvm-5x2c-j2w7
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Lifecycle Timeline
4Description
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 tags can be corrupted by exceeding the Python recursion limit. This can result in a Denial of service by crashing the application with a RecursionError. We recommend upgrading to version =>6.31.1 or beyond commit 17838beda2943d08b8a9d4df5b68f5f04f26d901
Analysis
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 tags can be corrupted by exceeding the Python recursion limit. This can result in a Denial of service by crashing the application with a RecursionError. We recommend upgrading to version =>6.31.1 or beyond commit 17838beda2943d08b8a9d4df5b68f5f04f26d901
Technical Context
A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users. This vulnerability is classified as Uncontrolled Recursion (CWE-674).
Affected Products
Affected products: Google Protobuf-Python
Remediation
A vendor patch is available — apply it immediately. Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.
Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| upstream | released | 6.31.1 |
| jammy | released | 3.12.4-1ubuntu7.22.04.4 |
| noble | released | 3.21.12-8.2ubuntu0.2 |
| oracular | ignored | end of life |
| plucky | released | 3.21.12-10ubuntu0.1 |
| bionic | released | 3.0.0-9.1ubuntu1.1+esm3 |
| focal | released | 3.6.1.3-2ubuntu5.2+esm2 |
| trusty | ignored | changes too intrusive |
| xenial | released | 2.6.1-1.3ubuntu0.1~esm4 |
Debian
Bug #1108057| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | vulnerable | 3.12.4-1+deb11u1 | - |
| bookworm | vulnerable | 3.21.12-3 | - |
| trixie | vulnerable | 3.21.12-11 | - |
| forky, sid | fixed | 3.21.12-15 | - |
| (unstable) | fixed | 3.21.12-12 | - |
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External POC / Exploit Code
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