GHSA-5jfw-35xp-5m42

Source

https://github.com/advisories/GHSA-5jfw-35xp-5m42

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/04/GHSA-5jfw-35xp-5m42/GHSA-5jfw-35xp-5m42.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-5jfw-35xp-5m42

Published

2022-04-05T17:53:22Z

Modified

2024-12-05T05:39:20Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Buffer length underflow in LoginPacket causing unchecked exceptions to be thrown

Details

Impact

LoginPacket uses BinaryStream->getLInt() to read the lengths of JSON payloads it wants to decode. Unfortunately, BinaryStream->getLInt() returns a signed integer, meaning that a malicious client can craft a packet with a large uint32 value for payload buffer size (which would be interpreted as a negative signed int32), causing BinaryStream->get() to throw an exception.

In the context of PocketMine-MP, this leads to a server crash when the vulnerability is exploited.

Patches

e3fce7632b94e83fd6a518a87dcaf6a11681c4ac

Workarounds

This can be worked around by registering a custom LoginPacket implementation into PacketPool which overrides this code to patch it.

For more information

Email us at team@pmmp.io

Database specific

{
    "cwe_ids": [
        "CWE-124"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-04-05T17:53:22Z",
    "nvd_published_at": null,
    "severity": "HIGH"
}

References

Affected packages

Packagist / pocketmine/bedrock-protocol

Package

Name: pocketmine/bedrock-protocol
Purl: pkg:composer/pocketmine/bedrock-protocol

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

8.0.2

Affected versions

1.*

1.0.0+bedrock-1.17.10

1.1.0+bedrock-1.17.10

2.*

2.0.0+bedrock-1.17.30

3.*

3.0.0+bedrock-1.17.40

3.0.1+bedrock-1.17.40

3.0.2+bedrock-1.17.40

4.*

4.0.0+bedrock-1.17.40

4.0.1+bedrock-1.17.40

5.*

5.0.0+bedrock-1.17.40

5.1.0+bedrock-1.17.40

5.1.1+bedrock-1.17.40

5.1.2+bedrock-1.17.40

5.1.3+bedrock-1.17.40

6.*

6.0.0+bedrock-1.17.40

7.*

7.0.0+bedrock-1.18.0

7.1.0+bedrock-1.18.0

7.2.0+bedrock-1.18.0

7.3.0+bedrock-1.18.0

7.3.1+bedrock-1.18.0

8.*

8.0.0+bedrock-1.18.10

8.0.1+bedrock-1.18.10

8.0.2+bedrock-1.18.10

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/04/GHSA-5jfw-35xp-5m42/GHSA-5jfw-35xp-5m42.json"