Spring Cloud Config up to 1.4.5/2.0.3/2.1.1 spring-cloud-config-server path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in Spring Cloud Config up to 1.4.5/2.0.3/2.1.1. Affected is an unknown function of the component spring-cloud-config-server. Performing a manipulation results in path traversal. This vulnerability is reported as CVE-2019-3799. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Spring Cloud Config up to 1.4.5/2.0.3/2.1.1 (Cloud Software). This affects an unknown code of the component spring-cloud-config-server. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

Spring Cloud Config, versions 2.1.x prior to 2.1.2, versions 2.0.x prior to 2.0.4, and versions 1.4.x prior to 1.4.6, and older unsupported versions allow applications to serve arbitrary configuration files through the spring-cloud-config-server module. A malicious user, or attacker, can send a request using a specially crafted URL that can lead a directory traversal attack.

The bug was discovered 04/16/2019. The weakness was disclosed 05/06/2019 (Website). The advisory is shared at pivotal.io. This vulnerability is uniquely identified as CVE-2019-3799 since 01/03/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The exploit is shared for download at packetstormsecurity.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 20 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13473 (Pivotal Spring Cloud Config Directory Traversal Vulnerability).

Upgrading to version 1.4.6, 2.0.4 or 2.1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (46772). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Cloud Software

Name

• Spring Cloud Config

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.1.0
• 2.1.1

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

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• 🔍
• 🔍

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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