CVE-2015-2853
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 · uneditedSession fixation vulnerability in the WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before 3.8.4 allows remote attackers to hijack web sessions by providing a session ID.
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 confidenceSession fixation vulnerability in the WebUI component of Blue Coat SSL Visibility Appliance allows remote attackers to hijack web sessions by providing/influencing a session ID. Attackers can set a known session ID before user authentication, then use that same ID to take over the authenticated session.
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<= 3.8.3<= 3.8.3<= 3.8.3<= 3.8.3CVSS 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
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
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 the SSL Visibility Appliance modelAccess the appliance WebUI or CLI and locate the device model information (SV800, SV1800, SV2800, or SV3800) in the system status or about sectionAffected if The model is one of SV800, SV1800, SV2800, or SV3800 and the firmware is 3.8.3 or earlier
-
Check the installed firmware versionIn the WebUI, navigate to the status or system information page to view the firmware version; alternatively, use the CLI command to display the version (typically 'show version' or similar)Affected if The firmware version is 3.8.3 or lower
-
Verify if the WebUI component is enabledCheck the appliance configuration through the CLI or WebUI to confirm whether the WebUI service is currently enabled and accessibleAffected if The WebUI is enabled and accessible on the network
-
Confirm session ID regeneration behaviorThis requires a controlled test: open a browser, note the session cookie, authenticate with valid credentials, then check if the session ID value changes after successful loginAffected if The session ID remains the same before and after authentication (session fixation vulnerability present)
The environment is affected if the SSL Visibility Appliance model is SV800, SV1800, SV2800, or SV3800 with firmware version 3.8.3 or lower AND the WebUI is enabled, because session IDs are not regenerated upon authentication.
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 dataUpgrade to Blue Coat SSL Visibility Appliance version 3.8.4 or later. Additionally, ensure session IDs are regenerated upon authentication to prevent session fixation attacks.
- Consultation4.0 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 $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-2853 — 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-2015-2853 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