CVE-2020-8434
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 · uneditedJenzabar JICS (aka Internet Campus Solution) before 9.0.1 Patch 3, 9.1 before 9.1.2 Patch 2, and 9.2 before 9.2.2 Patch 8 has session cookies that are a deterministic function of the username. There is a hard-coded password to supply a PBKDF feeding into AES to encrypt a username and base64 encode it to a client-side cookie for persistent session authentication. By knowing the key and algorithm, an attacker can select any username, encrypt it, base64 encode it, and save it in their browser with the correct JICSLoginCookie cookie format to impersonate any real user in the JICS database without the need for authenticating (or verifying with MFA if implemented).
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 confidenceJenzabar JICS uses a hard-coded password to derive encryption keys via PBKDF for AES encryption of usernames, which are then base64 encoded into client-side session cookies (JICSLoginCookie). An attacker can encrypt any username with the known hard-coded key and forge valid session cookies to impersonate any user, bypassing authentication and MFA.
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<= 9.0.1>= 9.1.0, <= 9.1.2>= 9.2.0, <= 9.2.2CVSS 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.
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Confirm Jenzabar JICS is installedLook for Jenzabar JICS installation directories, services, or web applications in your environment. Check for processes named 'JICS' or application pools hosting Jenzabar components.Affected if Jenzabar JICS software is present in the environment
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Identify the installed JICS versionLocate version information in the Jenzabar installation directory, typically in an 'About' page, version.txt, or assembly metadata. Compare your version against the affected ranges: <= 9.0.1, >= 9.1.0 and <= 9.1.2, or >= 9.2.0 and <= 9.2.2.Affected if The installed version falls within any of the affected version ranges listed
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Locate the hard-coded password in configuration or codeSearch Jenzabar installation directories for files containing the hard-coded password used for PBKDF key derivation. Look in configuration files, .config files, or embedded resources where cryptographic keys may be stored. The hard-coded password is used to derive AES encryption keys.Affected if A hard-coded password is found in Jenzabar configuration files or code that is used for the PBKDF-based AES encryption of usernames
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Verify JICSLoginCookie is in useInspect web traffic or browser cookies to determine if JICSLoginCookie session cookies are being generated and used by the application. This cookie contains base64-encoded AES-encrypted usernames.Affected if JICSLoginCookie is being generated and used for session management
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Confirm the encryption uses the hard-coded keyExamine the encryption implementation code or configuration to verify that the hard-coded password is directly used in the PBKDF key derivation for AES encryption of session cookie values. Decrypt a known cookie value using the hard-coded key to verify the vulnerability.Affected if The encryption implementation derives AES keys from the hard-coded password rather than a unique, rotated key
Your environment is affected if Jenzabar JICS is installed with a version <= 9.0.1, between 9.1.0-9.1.2, or between 9.2.0-9.2.2, and the application uses hard-coded credentials for session cookie encryption.
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.
dbcve · scopedUpdate to the patched versions (9.0.1 Patch 3, 9.1.2 Patch 2, or 9.2.2 Patch 8) and immediately rotate the hard-coded cryptographic key, then invalidate all existing sessions.
Apply version-specific security patches: 9.0.1 Patch 3, 9.1.2 Patch 2, or 9.2.2 Patch 8 (depending on your current version branch)
- For Jenzabar JICS version 9.0.x: Apply Patch 3 or later to resolve the session cookie vulnerability
- For Jenzabar JICS version 9.1.x: Apply Patch 2 or later to resolve the session cookie vulnerability
- For Jenzabar JICS version 9.2.x: Apply Patch 8 or later to resolve the session cookie vulnerability
- After applying the patch, verify that session cookies are no longer generated using the hard-coded key and deterministic encryption method
- Confirm that existing persistent sessions are invalidated and users must re-authenticate
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-8434 — 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-2020-8434 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
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- 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