VDB-124932 · CVE-2018-15430 · Qualys 38746

Cisco Expressway/TelePresence Video Communication Server input validation

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability, which was classified as critical, was found in Cisco Expressway and TelePresence Video Communication Server (Unified Communication Software) (version unknown). Affected is an unknown part. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-20. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the administrative web interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute code with user-level privileges on the underlying operating system. The vulnerability is due to insufficient validation of the content of upgrade packages. An attacker could exploit this vulnerability by uploading a malicious archive to the Upgrade page of the administrative web interface. A successful exploit could allow the attacker to execute code with user-level privileges on the underlying operating system.

The bug was discovered 10/03/2018. The weakness was disclosed 10/05/2018 as cisco-sa-20181003-express-vcs- as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2018-15430 since 08/17/2018. It is possible to launch the attack remotely. A authentication is necessary for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38746 (Cisco Expressway Series and Cisco TelePresence Video Communication Server Remote Code Execution Vulnerability(cisco-sa-20181003-express-vcs-rce)).

Upgrading eliminates this vulnerability.

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VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔍

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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: tools.cisco.com

Timelineinfoedit

08/17/2018 🔍
10/03/2018 +47 days 🔍
10/05/2018 +1 days 🔍
10/05/2018 +0 days 🔍
10/06/2018 +1 days 🔍
03/30/2020 +541 days 🔍

Sourcesinfoedit

Vendor: https://www.cisco.com/

Advisory: cisco-sa-20181003-express-vcs-
Status: Confirmed

CVE: CVE-2018-15430 (🔍)

Entryinfoedit

Created: 10/06/2018 01:09 PM
Updated: 03/30/2020 08:35 PM
Changes: (1) vulnerability_discoverydate
Complete: 🔍

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