Remote commands execution in Bitbucket Server and Data Center

1) OS Command Injection

EUVDB-ID: #VU66798

Risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-36804

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within multiple API endpoints. A remote attacker with access to a public repository or read permissions to a private Bitbucket repository can send a specially crafted HTTP request and execute arbitrary OS commands on the server.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Bitbucket Server: 7.0.1 - 8.3.0

Bitbucket Data Center: 7.0.1 - 8.3.0

External links

http://jira.atlassian.com/browse/BSERV-13438
http://confluence.atlassian.com/bitbucketserver/bitbucket-server-and-data-center-advisory-2022-08-24-1155489835.html

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?

Yes. This vulnerability is being exploited in the wild.