Cisco WebEx Meetings Server up to 2.8MR2/3.0MR2 Castor XML 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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5.1$0-$5k0.00

A vulnerability, which was classified as critical, was found in Cisco WebEx Meetings Server up to 2.8MR2/3.0MR2 (Unified Communication Software). Affected is some unknown processing of the component Castor XML. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A version of Castor XML, as used in Cisco WebEx Meetings Server before 2.8MR3 and 3.x before 3.0MR2 patch 1 and other products, allows XXE attacks.

The bug was discovered 11/02/2018. The weakness was disclosed 01/30/2019 as not defined mailinglist post (Bugtraq). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2018-18895 since 11/01/2018. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 89 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.8MR3 or 3.0MR2 Patch 1 eliminates this vulnerability.

Productinfo

Type

Vendor

Name

Version

License

Support

  • end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

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

Local: Yes
Remote: No

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: WebEx Meetings Server 2.8MR3/3.0MR2 Patch 1

Timelineinfo

11/01/2018 🔍
11/02/2018 +1 days 🔍
01/30/2019 +89 days 🔍
01/30/2019 +0 days 🔍
01/31/2019 +1 days 🔍
07/04/2023 +1615 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: 150162
Status: Not defined

CVE: CVE-2018-18895 (🔍)
SecurityTracker: 1042085

Entryinfo

Created: 01/31/2019 13:03
Updated: 07/04/2023 08:31
Changes: 01/31/2019 13:03 (45), 05/06/2020 20:03 (1), 07/04/2023 08:31 (3)
Complete: 🔍

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