Detections
Analytics

SCA: security update for MessagePack (GHSA-4qm4-8hg2-g2xm)

high Tenable Self-Hosted Container Security Plugin ID 410345

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - ### Impact When this library is used to deserialize messagepack data from an untrusted source, there is a
 risk of a denial of service attack by an attacker that sends data contrived to produce hash collisions,
 leading to large CPU consumption disproportionate to the size of the data being deserialized. This is
 similar to [a prior advisory](https://github.com/MessagePack-CSharp/MessagePack-
 CSharp/security/advisories/GHSA-7q36-4xx7-xcxf), which provided an inadequate fix for the hash collision
 part of the vulnerability. ### Patches The following steps are required to mitigate this risk. 1. Upgrade
 to a version of the library where a fix is available. 1. Review the steps in [this previous
 advisory](https://github.com/MessagePack-CSharp/MessagePack-
 CSharp/security/advisories/GHSA-7q36-4xx7-xcxf) to ensure you have your application configured for
 untrusted data. ### Workarounds If upgrading MessagePack to a patched version is not an option for you,
 you may apply a manual workaround as follows: 1. Declare a class that derives from `MessagePackSecurity`.
 2. Override the `GetHashCollisionResistantEqualityComparer<T>` method to provide a collision-resistant
 hash function of your own and avoid calling `base.GetHashCollisionResistantEqualityComparer<T>()`. 3.
 Configure a `MessagePackSerializerOptions` with an instance of your derived type by calling `WithSecurity`
 on an existing options object. 4. Use your custom options object for all deserialization operations. This
 may be by setting the `MessagePackSerializer.DefaultOptions` static property, if you call methods that
 rely on this default property, and/or by passing in the options object explicitly to any `Deserialize`
 method. ### References - Learn more about best security practices when reading untrusted data with
 [MessagePack 1.x](https://github.com/MessagePack-CSharp/MessagePack-CSharp/tree/v1.x#security) or
 [MessagePack 2.x](https://github.com/MessagePack-CSharp/MessagePack-CSharp#security). - The .NET team's
 [discussion on hash collision vulnerabilities of their `HashCode` struct](https://github.com/GrabYourPitch
 forks/runtime/blob/threat_models/docs/design/security/System.HashCode.md). ### For more information If you
 have any questions or comments about this advisory: * [Start a public
 discussion](https://github.com/MessagePack-CSharp/MessagePack-CSharp/discussions) * [Email us
 privately](mailto:[email protected]) (CVE-2024-48924)

See Also

https://github.com/advisories/GHSA-4qm4-8hg2-g2xm

Plugin Details

Severity: High

ID: 410345

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.92

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2024-48924

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/17/2024

Vulnerability Publication Date: 10/17/2024

Reference Information

CVE: CVE-2024-48924

cwe: CWE-328