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Improper Restriction of XML External Entity Reference in bedework:bw-webdav

High severity GitHub Reviewed Published Dec 19, 2018 to the GitHub Advisory Database • Updated May 15, 2024

Package

maven org.bedework:bw-webdav (Maven)

Affected versions

>= 4.0.1, < 4.0.3

Patched versions

4.0.3

Description

Apereo Bedework bw-webdav before 4.0.3 allows XXE attacks, as demonstrated by an invite-reply document that reads a local file, related to webdav/servlet/common/MethodBase.java and webdav/servlet/common/PostRequestPars.java.

References

Published to the GitHub Advisory Database Dec 19, 2018
Reviewed Jun 16, 2020
Last updated May 15, 2024

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
High
Integrity
None
Availability
None

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

EPSS score

0.139%
(51st percentile)

Weaknesses

CVE ID

CVE-2018-20000

GHSA ID

GHSA-5p52-j8pw-j7x5

Source code

Credits

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