CVE-2023-42769
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 cookie session ID is of insufficient length and can be exploited by brute force, which may allow a remote attacker to obtain a valid session, bypass authentication, and manipulate the transmitter.
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 · moderate confidenceThe cookie session ID is generated with insufficient entropy (too short), making it vulnerable to brute force attacks. An attacker can systematically guess valid session IDs, allowing them to hijack existing sessions, bypass authentication controls, and manipulate the transmitter/system.
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 dataall versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/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 the transmitter modelCheck the device label, documentation, or web interface header to confirm the exact model (Exc5000gx, Exc120gx, Exc300gx, Exc1600gx, Exc2000gx, Exc1000gx, Exc3000gx, or Exc30gt)Affected if The model matches any of the affected Sielco Analog FM Transmitter models listed in the CVE
-
Verify the web interface is accessibleAttempt to reach the transmitter's web interface via HTTP/HTTPS on the expected management IP or hostnameAffected if The web interface is reachable and displays a login page for session authentication
-
Capture a session cookie after loginLog into the web interface using valid credentials and use browser developer tools or a proxy to capture the session cookie (typically named session, PHPSESSID, JSESSIONID, or similar)Affected if A session cookie is issued upon authentication
-
Measure the session ID lengthExamine the captured session cookie value and count the number of characters or bytes in the identifierAffected if The session ID appears shorter than 128 bits (typically less than 22 characters for base64 encoding, or fewer than 16 random bytes)
-
Test for session predictabilityCreate multiple sessions and compare the session IDs to see if they follow a sequential or low-entropy pattern rather than appearing randomAffected if Session IDs show predictable patterns such as sequential numbering, time-based values, or minimal variation between IDs
If you are using any of the listed Sielco transmitter models with their web interface enabled and the session cookie length is below 128-bit entropy (under 22 random characters), your environment is affected by this vulnerability.
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 dataIncrease session ID length to meet minimum 128-bit entropy standards using cryptographically secure random number generation, implement session ID regeneration after authentication, and consider adding rate limiting to mitigate brute force attempts.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-42769 — 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-2023-42769 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