Cloud Foundry up to v252 UAA OAuth Client denial of service

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 marked as problematic has been reported in Cloud Foundry up to v252. This affects an unknown function of the component UAA OAuth Client Handler. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2017-4960. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cloud Foundry up to v252 (Cloud Software). This issue affects an unknown code of the component UAA OAuth Client Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

An issue was discovered in Cloud Foundry release v247 through v252, UAA stand-alone release v3.9.0 through v3.11.0, and UAA Bosh Release v21 through v26. There is a potential to subject the UAA OAuth clients to a denial of service attack.

The bug was discovered 03/08/2017. The weakness was disclosed 03/10/2017 (Website). It is possible to read the advisory at cloudfoundry.org. The identification of this vulnerability is CVE-2017-4960 since 12/29/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

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 96780†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Cloud Software

Name

• Cloud Foundry

Version

• v247
• v248
• v249
• v250
• v251
• v252

License

• free

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
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: 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

12/29/2016 🔍
03/08/2017 +69 days 🔍
03/08/2017 +0 days 🔍
03/09/2017 +1 days 🔍
03/10/2017 +1 days 🔍
03/10/2017 +0 days 🔍
08/18/2020 +1257 days 🔍

Sourcesinfo

Advisory: cloudfoundry.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-4960 (🔍)
GCVE (CVE): GCVE-0-2017-4960
GCVE (VulDB): GCVE-100-97787
SecurityFocus: 96780 - Multiple Cloud Foundry Products CVE-2017-4960 Denial of Service Vulnerability
OSVDB: - CVE-2017-4960 - Pivotal - Cloud Foundry - Denial of Service Issue

Entryinfo

Created: 03/10/2017 09:49
Updated: 08/18/2020 16:16
Changes: 03/10/2017 09:49 (58), 08/18/2020 16:16 (5)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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