VDB-104908 · CVE-2017-6763 · BID 100111

Cisco Meeting Server up to 2.1.4 H.264 input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$5k-$25k0.00

Summaryinfo

A vulnerability was found in Cisco Meeting Server up to 2.1.4. It has been declared as problematic. Affected by this issue is some unknown functionality of the component H.264 Handler. Executing a manipulation can lead to input validation. This vulnerability appears as CVE-2017-6763. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in Cisco Meeting Server up to 2.1.4 (Unified Communication Software) and classified as problematic. This vulnerability affects some unknown processing of the component H.264 Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) 2.1.4 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability exists because the affected application does not properly validate Fragmentation Unit (FU-A) protocol packets. An attacker could exploit this vulnerability by sending a crafted H.264 FU-A packet through the affected application. A successful exploit could allow the attacker to cause a DoS condition on the affected system due to an unexpected restart of the CMS media process on the system. Although the CMS platform continues to operate and only the single, affected CMS media process is restarted, a brief interruption of media traffic for certain users could occur. Cisco Bug IDs: CSCve10131.

The bug was discovered 08/02/2017. The weakness was presented 08/07/2017 with Cisco (Website). The advisory is shared for download at quickview.cloudapps.cisco.com. This vulnerability was named CVE-2017-6763 since 03/09/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/07/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 100111†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 103403
OpenVAS Name: Cisco Meeting Server H.264 Protocol Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/09/2017 🔍
08/02/2017 +146 days 🔍
08/02/2017 +0 days 🔍
08/07/2017 +5 days 🔍
08/07/2017 +0 days 🔍
08/07/2017 +0 days 🔍
01/07/2021 +1249 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: quickview.cloudapps.cisco.com
Researcher: Cisco
Organization: Cisco
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6763 (🔍)
GCVE (CVE): GCVE-0-2017-6763
GCVE (VulDB): GCVE-100-104908
SecurityFocus: 100111 - Cisco Meeting Server CVE-2017-6763 Denial of Service Vulnerability
SecurityTracker: 1039058

Entryinfo

Created: 08/07/2017 16:43
Updated: 01/07/2021 13:43
Changes: 08/07/2017 16:43 (63), 11/04/2019 09:49 (5), 01/07/2021 13:36 (3), 01/07/2021 13:43 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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