Apereo Bedework bw-webdav up to 4.0.2 XML Data MethodBase.java xml external entity reference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Apereo Bedework bw-webdav up to 4.0.2. The affected element is an unknown function of the file webdav/servlet/common/MethodBase.java of the component XML Data Handler. Such manipulation leads to xml external entity reference. This vulnerability is referenced as CVE-2018-20000. The attack can only be performed from a local environment. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apereo Bedework bw-webdav up to 4.0.2 and classified as critical. Affected by this issue is an unknown part of the file webdav/servlet/common/MethodBase.java of the component XML Data Handler. The manipulation with an unknown input leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 11/28/2018. The weakness was published 12/10/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-20000 since 12/09/2018. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 4.0.3 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: bw-webdav 4.0.3
Patch: github.com

Timelineinfo

11/28/2018 🔍
12/09/2018 +11 days 🔍
12/09/2018 +0 days 🔍
12/10/2018 +1 days 🔍
12/10/2018 +0 days 🔍
06/13/2023 +1646 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-20000 (🔍)
GCVE (CVE): GCVE-0-2018-20000
GCVE (VulDB): GCVE-100-127760

Entryinfo

Created: 12/10/2018 10:45
Updated: 06/13/2023 20:34
Changes: 12/10/2018 10:45 (60), 04/19/2020 12:20 (1), 06/13/2023 20:34 (4)
Complete: 🔍
Cache ID: 216::103

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