Atlassian has warned users of its Bamboo, Bitbucket, Confluence, Fisheye, Crucible, and Jira products that a pair of critical-rated flaws threaten their security.
The company’s July security advisories detail “Servlet Filter dispatcher vulnerabilities.”
One of the flaws – CVE-2022-26136 – is described as an arbitrary Servlet Filter bypass that means an attacker could send a specially crafted HTTP request to bypass custom Servlet Filters used by third-party apps to enforce authentication.
The scary part is that the flaw allows a remote, unauthenticated attacker to bypass authentication used by third-party apps. The really scary part is that Atlassian doesn’t have a definitive list of apps that could be impacted.
“Atlassian has released updates that fix the root cause of this vulnerability, but has not exhaustively enumerated all potential consequences of this vulnerability,” it added.
The second flaw – CVE-2022-26137 – is a cross-origin resource sharing (CORS) bypass.
Atlassian explains it as follows: “Sending a specially crafted HTTP request can invoke the Servlet Filter used to respond to CORS requests, resulting in a CORS bypass. An attacker that can trick a user into requesting a malicious URL can access the vulnerable application with the victim’s permissions.”
Confluence users have another flaw to worry about: CVE-2022-26138 reveals that one of its Confluence apps has a hard-coded password in place to help migrations to the cloud. It explained:
If that password falls into the wrong hands, a Confluence implementation is an open book.
The flaws are present in years-old versions of Atlassian products. Fixes have been issued and require upgrades. Cloudy versions of the products hosted by Atlassian have already been fixed.
News of the vulnerabilities comes just six weeks after Atlassian’s admission of another critical flaw in Confluence that was under active attack.
With or without such attacks, Atlassian has had a tough year. Three critical flaws that have been present in products for years – and an embarrassing cloud outage – are not the sort of thing that enterprise customers appreciate. ®