Security Experts:

Atlassian Ships Urgent Patch for Critical Bitbucket Vulnerability

Atlassian’s security response team has issued an urgent advisory to warn of a critical command injection flaw in its Bitbucket Server and Data Center product.

The vulnerability carries a CVSS severity score of 9.9 out of 10 and can be exploited remotely to launch code execution attacks, Atlassian said.

Atlassian said the security defect,  tracked as CVE-2022-36804, was introduced in version 7.0.0 of Bitbucket Server and Data Center.

From the alert:

"There is a command injection vulnerability in multiple API endpoints of Bitbucket Server and Data Center. An attacker with access to a public Bitbucket repository or with read permissions to a private one can execute arbitrary code by sending a malicious HTTP request.

All versions released after 6.10.17 including 7.0.0 and newer are affected, this means that all instances that are running any versions between 7.0.0 and 8.3.0 inclusive can be exploited by this vulnerability."

The company said Atlassian Cloud sites are not affected by this issue.  

The disclosure of a new critical-severity issue from Atlassian follows the documentation of in-the-wild attacks hitting the Australian company’s widely deployed Confluence software product.

This year alone, the U.S. government’s cybersecurity response agency CISA has listed four distinct Atlassian software flaws in its KEV (Known Exploited Vulnerabilities) catalog

Related: Atlassian Patches Critical Authentication Bypass Vulnerability in Jira

Related: Atlassian Confluence Servers Hacked via Zero-Day Vulnerability

Related: Atlassian Expects Confluence App Exploitation After Hardcoded Password Leak

Related: Atlassian Patches Confluence Zero-Day as Exploitation Attempts Surge

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Ryan Naraine is Editor-at-Large at SecurityWeek and host of the popular Security Conversations podcast series. Ryan is a veteran cybersecurity strategist who has built security engagement programs at major global brands, including Intel Corp., Bishop Fox and GReAT. He is a co-founder of Threatpost and the global SAS conference series. Ryan's past career as a security journalist included bylines at major technology publications including Ziff Davis eWEEK, CBS Interactive's ZDNet, PCMag and PC World. Ryan is a director of the Security Tinkerers non-profit, an advisor to early-stage entrepreneurs, and a regular speaker at security conferences around the world. Follow Ryan on Twitter @ryanaraine.