#VU18629 Path traversal in Bitbucket Server - CVE-2019-3397

Vulnerability identifier: #VU18629

Vulnerability risk: High

CVSSv4.0: 2.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Amber]

CVE-ID: CVE-2019-3397

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Bitbucket Server
Server applications / Application servers

Vendor: Atlassian

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences via the Data Center migration tool. A remote attacker with authenticated user with admin permissions can send a specially crafted HTTP request and read or write to arbitrary files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Bitbucket Server: 5.13.0 - 5.16.2, 6.0.0 - 6.0.2, 6.1.0 - 6.1.1

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External links
https://packetstormsecurity.com/files/download/153052/bitbucket-traversal.txt
https://jira.atlassian.com/browse/BSERV-11706

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.