Path traversal in Pivotal Spring Cloud Config

1) Path traversal

EUVDB-ID: #VU18426

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2019-3799

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists because the spring-cloud-config-server module of the affected software allows applications to serve static resources from a file system. A remote attacker can send a specially crafted HTTP request and read, overwrite or delete arbitrary files on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Spring Cloud Config: v1.1.0.M1 - 1.1.0.

CPE2.3

• cpe:2.3:a:pivotal:spring_cloud_config:v1.1.0.M1:*:*:*:*:*:*:*
• cpe:2.3:a:pivotal:spring_cloud_config:v1.1.0.M2:*:*:*:*:*:*:*
• cpe:2.3:a:pivotal:spring_cloud_config:v1.1.0.M3:*:*:*:*:*:*:*

External links

https://github.com/mpgn/CVE-2019-3799
https://pivotal.io/security/cve-2019-3799

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.