CrowdApplication · Atlassian
CVE-2017-18105
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe console login resource in Atlassian Crowd before version 3.0.2 and from version 3.1.0 before version 3.1.1 allows remote attackers, who have previously obtained a user's JSESSIONID cookie, to gain access to some of the built-in and potentially third party rest resources via a session fixation vulnerability.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is a session fixation vulnerability in Atlassian Crow's console login resource. Attackers who have previously obtained a user's JSESSIONID cookie can exploit the failure to regenerate session IDs upon login, allowing them to hijack the user's session and access built-in and third-party REST resources.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
CrowdApplication
< 3.0.2>= 3.1.0, < 3.1.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify installed Atlassian Crowd versionCheck the Crowd version from the application startup logs, the admin console 'About' page (typically at /console/admin/viewabout.action), or the VERSION.txt file in the Crowd installation directoryAffected if The installed version is less than 3.0.2, or greater than or equal to 3.1.0 but less than 3.1.1
-
Confirm Crowd console login is enabledVerify the Atlassian Crowd console web interface is accessible at /console/login.action (the default port is 7995 for embedded or 8095 for standalone)Affected if The console login resource is accessible and in use; the vulnerability exists in this console login resource
-
Check for existing JSESSIONID sessionsInspect browser cookies or server-side session storage for existing JSESSIONID values associated with the Crowd consoleAffected if Users have existing persistent JSESSIONID cookies from prior logins, which could be exploited for session fixation if the version is vulnerable
You are affected if your Atlassian Crowd version is below 3.0.2 or between 3.1.0 and 3.1.1 inclusive, and users access the console login interface with pre-existing session cookies.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data3.0.23.1.1
Upgrade Atlassian Crowd to version 3.0.2, 3.1.1, or later. These versions implement proper session ID regeneration on authentication, preventing session fixation attacks.
Fix this in Crowd
Scoped from the published advisory
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-18105 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2017-18105 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data