Vulnerability identifier: #VU69408
Vulnerability risk: High
CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-78
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Bitbucket Server
Server applications /
Application servers
Bitbucket Data Center
Server applications /
Other server solutions
Vendor: Atlassian
Description
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation when processing usernames. A remote attacker with ability to control their own username (e.g. with enabled "Allow public signup" option) can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
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: 8.4.0 - 8.4.1, 8.3.0 - 8.3.2, 8.2.0 - 8.2.3, 8.1.0 - 8.1.4, 8.0.0 - 8.0.4, 7.21.0 - 7.21.5, 7.17.0 - 7.17.11, 7.20.0 - 7.20.3, 7.19.0 - 7.19.5, 7.18.0 - 7.18.4, 7.16.0 - 7.16.3, 7.15.0 - 7.15.3, 7.14.0 - 7.14.2, 7.13.0 - 7.13.1, 7.12.0 - 7.12.1, 7.11.1 - 7.11.2, 7.10.0 - 7.10.1, 7.9.0 - 7.9.1, 7.8.0 - 7.8.1, 7.7.0 - 7.7.1, 7.6.0 - 7.6.17, 7.5.0 - 7.5.2, 7.4.0 - 7.4.2, 7.3.0 - 7.3.2, 7.2.0 - 7.2.6, 7.1.0 - 7.1.4, 7.0.1 - 7.0.5
Bitbucket Data Center: 8.4.0 - 8.4.1, 8.3.0 - 8.3.2, 8.2.0 - 8.2.3, 8.1.0 - 8.1.4, 8.0.0 - 8.0.4, 7.21.0 - 7.21.5, 7.20.0 - 7.20.3, 7.19.0 - 7.19.5, 7.18.0 - 7.18.4, 7.17.0 - 7.17.11, 7.16.0 - 7.16.3, 7.15.0 - 7.15.3, 7.14.0 - 7.14.2, 7.13.0 - 7.13.1, 7.12.0 - 7.12.1, 7.11.1 - 7.11.2, 7.10.0 - 7.10.1, 7.9.0 - 7.9.1, 7.8.0 - 7.8.1, 7.7.0 - 7.7.1, 7.6.0 - 7.6.17, 7.5.0 - 7.5.2, 7.4.0 - 7.4.2, 7.3.0 - 7.3.2, 7.2.0 - 7.2.6, 7.1.0 - 7.1.4, 7.0.1 - 7.0.5
External links
http://confluence.atlassian.com/x/Y4hXRg
http://jira.atlassian.com/browse/BSERV-13522
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.