VDB-106920 · CVE-2015-8559 · ID 3871

Progress Chef Infra Client prior 15.0.293 Knife Bootstrap Command /var/log/messages Private Key information disclosure

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, which was classified as problematic, was found in Progress Chef Infra Client. Affected by this vulnerability is an unknown functionality of the file /var/log/messages of the component Knife Bootstrap Command Handler. The manipulation results in information disclosure (Private Key). This vulnerability is known as CVE-2015-8559. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Progress Chef Infra Client (Automation Software). Affected is some unknown functionality of the file /var/log/messages of the component Knife Bootstrap Command Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (Private Key). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

The knife bootstrap command in chef leaks the validator.pem private RSA key to /var/log/messages.

The bug was discovered 12/14/2015. The weakness was published 09/21/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2015-8559 since 12/14/2015. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 744 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 15.0.293 eliminates this vulnerability. The upgrade is hosted for download at docs.chef.io. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Automation Software

Vendor

Progress

Name

Chef Infra Client

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
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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

Name: Private Key
Class: Information disclosure / Private Key
CWE: CWE-200 / CWE-284 / CWE-266
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: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Chef Infra Client 15.0.293
Patch: github.com
Workaround: Removing sh -c wrapper around the bootstrapper command string

Timelineinfo

09/08/2015 🔍
12/14/2015 +97 days 🔍
12/14/2015 +0 days 🔍
09/21/2017 +647 days 🔍
09/21/2017 +0 days 🔍
09/21/2017 +0 days 🔍
05/14/2019 +599 days 🔍
12/29/2024 +2056 days 🔍