Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2020-1947

Deserialization of Untrusted Data

Published: Mar 11, 2020 | Modified: Nov 21, 2024
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-1947
CWEhttps://cwe.mitre.org/data/definitions/502.html

In Apache ShardingSphere(incubator) 4.0.0-RC3 and 4.0.0, the ShardingSpheres web console uses the SnakeYAML library for parsing YAML inputs to load datasource configuration. SnakeYAML allows to unmarshal data to a Java type By using the YAML tag. Unmarshalling untrusted data can lead to security flaws of RCE.

Weakness

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

Affected Software

Name Vendor Start Version End Version
Shardingsphere Apache 4.0.0 (including) 4.0.0 (including)
Shardingsphere Apache 4.0.0-rc3 (including) 4.0.0-rc3 (including)

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

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