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Potential Denial Of Service in welcome channel module, making use of user-specified YAML

High
NoComment1105 published GHSA-7vfm-9766-h7hg Mar 18, 2023

Package

actions org.hyacinthbots:LilyBot (GitHub Actions)

Affected versions

v4.3.0 - v4.8.2

Patched versions

>=v4.8.3

Description

Impact

Lily makes use of Cozy's Welcome Channel module, which contains the affected dependency

Patches

In the latest LilyBot version (v4.8.3) we bump our dependency on the welcome channel module to 1.0.1-SNAPSHOT which contains the fixed versions

Workarounds

None.

References

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE ID

No known CVE

Weaknesses

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. Learn more on MITRE.

Credits