Denial Of Service (DoS)

2023-11-1507:06:01

Veracode Vulnerability Database

sca.analysiscenter.veracode.com

denial of service

remarshal.py

vulnerability

billion laughs attack

yaml files

application crash

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

18.8%

JSON

remarshal is vulnerable to Denial Of Service (DoS). The vulnerability exists because remarshal.py does not properly limit the maximum nodes to be expanded. This allows YAML alias nodes to be expanded indefinitely when processing untrusted YAML files. Consequently, an attacker could exploit this vulnerability to launch a Billion Laughs Attack, potentially causing an application crash.