VDB-126763 · CVE-2018-15795 · BID 105915

Pivotal CredHub Service Broker up to 1.0.x Random Number Generator weak prng

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Pivotal CredHub Service Broker up to 1.0.x. It has been rated as critical. Affected is an unknown function of the component Random Number Generator. This manipulation causes weak prng. This vulnerability appears as CVE-2018-15795. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Pivotal CredHub Service Broker up to 1.0.x. It has been declared as critical. Affected by this vulnerability is an unknown function of the component Random Number Generator. The manipulation with an unknown input leads to a weak prng vulnerability. The CWE definition for the vulnerability is CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Pivotal CredHub Service Broker, versions prior to 1.1.0, uses a guessable form of random number generation in creating service broker's UAA client. A remote malicious user may guess the client secret and obtain or modify credentials for users of the CredHub Service.

The bug was discovered 11/09/2018. The weakness was presented 11/13/2018 (Website). It is possible to read the advisory at pivotal.io. This vulnerability is known as CVE-2018-15795 since 08/23/2018. The exploitation appears to be easy. The attack can be launched remotely. The successful exploitation requires a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.1.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105915†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 8.1
NVD Vector: 🔍

CNA Base Score: 8.1
CNA Vector (Dell): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Weak prng
CWE: CWE-338 / CWE-331 / CWE-330
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: CredHub Service Broker 1.1.0

Timelineinfo

08/23/2018 🔍
11/09/2018 +78 days 🔍
11/09/2018 +0 days 🔍
11/13/2018 +4 days 🔍
11/13/2018 +0 days 🔍
11/14/2018 +1 days 🔍
06/06/2023 +1665 days 🔍

Sourcesinfo

Vendor: pivotal.io

Advisory: pivotal.io
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-15795 (🔍)
GCVE (CVE): GCVE-0-2018-15795
GCVE (VulDB): GCVE-100-126763
SecurityFocus: 105915 - Pivotal Cloud Foundry CredHub Service Broker Predictable Random Number Generator Weakness

Entryinfo

Created: 11/14/2018 10:03
Updated: 06/06/2023 09:51
Changes: 11/14/2018 10:03 (60), 04/12/2020 12:34 (4), 06/06/2023 09:51 (14)
Complete: 🔍
Cache ID: 216::103

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

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