QID 379105

Date Published: 2024-01-02

QID 379105: Atlassian Bitbucket Data Center Remote Code Execution (RCE) Vulnerability (BSERV-14528)

Bitbucket Data Center looks like a single instance of Bitbucket Server to users, but under the hood, it consists of a cluster of multiple machines ("cluster nodes") each running the Bitbucket Server web application, behind a load balancer.

In Bitbucket server, SnakeYaml Constructor class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution (CVE-2022-43781).

Affected Versions:
Atlassian Bitbucket Server following versions: 7.17.x,7.18.x,7.19.x,7.20.x,7.21.0,7.21.1,7.21.2,7.21.3,7.21.4,7.21.5,7.21.6,7.21.7,7.21.8,7.21.9,7.21.10,7.21.11,7.21.12,7.21.13,7.21.14,7.21.15,8.0.x,8.1.x,8.2.x,8.3.x,8.4.x,8.5.x,.6.x,8.7.x,8.8.0,8.8.1,8.8.2,8.8.3,8.8.4,8.8.5,8.8.6,8.9.0,8.9.1,8.9.2,8.9.3,8.10.0,8.10.1,8.10.2,8.10.3,8.11.0,8.11.1,8.11.2,8.12.0

Detection Logic:(Unauthenticated)
The QID checks for vulnerable versions of Atlassian Bitbucket Server by sending a GET request to /login endpoint.

Detection Logic:(Authenticated)
The QID checks for vulnerable versions of Atlassian Bitbucket Server by checking the registry entry for windows and invoking commands in linux.

Successful exploitation of this vulnerability allows remote code execution which may aids further attacks.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution
    The vendor has released fix for this vulnerability. Customers are advised to refer to BSERV-14528 for more information pertaining to this vulnerability, please ref: CVE-2022-1471.
    Vendor References

    CVEs related to QID 379105

    CVE-2022-1471 |
    Software Advisories
    Advisory ID Software Component Link
    BSERV-14528 URL Logo jira.atlassian.com/browse/BSERV-14528
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].