VDB-159172 · CVE-2020-5761 · GCVE-0-2020-5761

Grandstream HT800 up to 1.0.17.5 TR-069 Service infinite loop

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Grandstream HT800 up to 1.0.17.5. It has been declared as problematic. This affects an unknown part of the component TR-069 Service. Executing a manipulation can lead to infinite loop. This vulnerability is tracked as CVE-2020-5761. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Grandstream HT800 up to 1.0.17.5. It has been declared as problematic. This vulnerability affects some unknown processing of the component TR-069 Service. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. CVE summarizes:

Grandstream HT800 series firmware version 1.0.17.5 and below is vulnerable to CPU exhaustion due to an infinite loop in the TR-069 service. Unauthenticated remote attackers can trigger this case by sending a one character TCP message to the TR-069 service.

The weakness was disclosed 07/29/2020 (Website). The advisory is shared for download at tenable.com. This vulnerability was named CVE-2020-5761 since 01/06/2020. The exploitation appears to be easy. 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 MITRE ATT&CK project declares the attack technique as T1499.

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

The entries VDB-159171, VDB-159173 and VDB-159174 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Grandstream

Name

HT800

Version

License

commercial

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

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/06/2020 🔍
07/29/2020 +205 days 🔍
07/30/2020 +1 days 🔍
07/30/2020 +0 days 🔍

Sourcesinfo

Advisory: tenable.com
Status: Not defined

CVE: CVE-2020-5761 (🔍)
GCVE (CVE): GCVE-0-2020-5761
GCVE (VulDB): GCVE-100-159172
See also: 🔍

Entryinfo

Created: 07/30/2020 16:52
Updated: 07/30/2020 16:57
Changes: 07/30/2020 16:52 (38), 07/30/2020 16:57 (17)
Complete: 🔍
Cache ID: 216::103