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Remarshal expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack

High severity GitHub Reviewed Published Nov 13, 2023 to the GitHub Advisory Database • Updated Nov 17, 2023

Package

pip remarshal (pip)

Affected versions

< 0.17.1

Patched versions

0.17.1

Description

Remarshal prior to v0.17.1 expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack. Processing untrusted YAML files may cause a denial-of-service (DoS) condition.

References

Published by the National Vulnerability Database Nov 13, 2023
Published to the GitHub Advisory Database Nov 13, 2023
Reviewed Nov 14, 2023
Last updated Nov 17, 2023

Severity

High
7.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CVE ID

CVE-2023-47163

GHSA ID

GHSA-gw7g-qr8w-3448

Source code

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