VDB-130565 · CVE-2019-3818 · BID 106744

kube-rbac-proxy up to 0.4.0 TLS Configuration risky encryption

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.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in kube-rbac-proxy up to 0.4.0. The affected element is an unknown function of the component TLS Configuration Handler. The manipulation leads to risky encryption. This vulnerability is referenced as CVE-2019-3818. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in kube-rbac-proxy up to 0.4.0 (Firewall Software). This issue affects an unknown functionality of the component TLS Configuration Handler. The manipulation with an unknown input leads to a risky encryption vulnerability. Using CWE to declare the problem leads to CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The kube-rbac-proxy container before version 0.4.1 as used in Red Hat OpenShift Container Platform does not honor TLS configurations, allowing for use of insecure ciphers and TLS 1.0. An attacker could target traffic sent over a TLS connection with a weak configuration and potentially break the encryption.

The bug was discovered 02/04/2019. The weakness was published 02/05/2019 (Website). The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2019-3818 since 01/03/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

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.

Upgrading to version 0.4.1 eliminates this vulnerability.

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Productinfo

Type

Firewall Software

Name

kube-rbac-proxy

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 3.7
CNA Vector (Red Hat, Inc.): 🔍

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: Risky encryption
CWE: CWE-327 / CWE-310
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: kube-rbac-proxy 0.4.1

Timelineinfo

01/03/2019 🔍
02/04/2019 +32 days 🔍
02/05/2019 +1 days 🔍
02/06/2019 +1 days 🔍
07/06/2023 +1611 days 🔍

Sourcesinfo

Advisory: access.redhat.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-3818 (🔍)
GCVE (CVE): GCVE-0-2019-3818
GCVE (VulDB): GCVE-100-130565
SecurityFocus: 106744

Entryinfo

Created: 02/06/2019 13:53
Updated: 07/06/2023 12:28
Changes: 02/06/2019 13:53 (57), 05/08/2020 16:06 (2), 07/06/2023 12:21 (4), 07/06/2023 12:28 (12)
Complete: 🔍
Cache ID: 216::103