CVE Vulnerabilities

CVE-2022-28948

Deserialization of Untrusted Data

Published: May 19, 2022 | Modified: Oct 28, 2022
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM

An issue in the Unmarshal function in Go-Yaml v3 causes the program to crash when attempting to deserialize invalid input.

Weakness

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Yaml Yaml_project 3.0.0 (including) 3.0.0 (including)
Cryostat 2 on RHEL 8 RedHat cryostat-tech-preview/cryostat-operator-bundle:2.1.1-2 *
Cryostat 2 on RHEL 8 RedHat cryostat-tech-preview/cryostat-reports-rhel8:1.0.0-2 *
Cryostat 2 on RHEL 8 RedHat cryostat-tech-preview/cryostat-rhel8:2.1.1-1 *
Cryostat 2 on RHEL 8 RedHat cryostat-tech-preview/cryostat-rhel8-operator:2.1.1-1 *
Cryostat 2 on RHEL 8 RedHat cryostat-tech-preview/jfr-datasource-rhel8:2.1.0-2 *
Red Hat OpenShift Dev Spaces 3 Containers RedHat devspaces/devspaces-rhel8-operator:3.15-10 *
Golang-gopkg-yaml.v3 Ubuntu impish *
Golang-gopkg-yaml.v3 Ubuntu upstream *
Snapd Ubuntu bionic *
Snapd Ubuntu devel *
Snapd Ubuntu esm-infra/bionic *
Snapd Ubuntu focal *
Snapd Ubuntu impish *
Snapd Ubuntu jammy *
Snapd Ubuntu kinetic *
Snapd Ubuntu lunar *
Snapd Ubuntu mantic *
Snapd Ubuntu noble *
Snapd Ubuntu snap *
Snapd Ubuntu upstream *
Snapd Ubuntu xenial *

Extended Description

It is often convenient to serialize objects for communication or to save them for later use. However, deserialized data or code can often be modified without using the provided accessor functions if it does not use cryptography to protect itself. Furthermore, any cryptography would still be client-side security – which is a dangerous security assumption. Data that is untrusted can not be trusted to be well-formed. When developers place no restrictions on “gadget chains,” or series of instances and method invocations that can self-execute during the deserialization process (i.e., before the object is returned to the caller), it is sometimes possible for attackers to leverage them to perform unauthorized actions, like generating a shell.

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References