CVE-2021-29695
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 · uneditedIBM Host firmware for LC-class Systems could allow a remote attacker to traverse directories on the system. An attacker could send a specially-crafted URL request that would allow them to delete arbitrary files on the system. IBM X-Force ID: 200558.
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 confidenceIBM Host firmware for LC-class Systems contains a directory traversal vulnerability that allows remote attackers to send specially-crafted URL requests to delete arbitrary files on the system. The vulnerability stems from insufficient input validation on URL parameters, enabling path traversal sequences (e.g., ../../../') to escape the intended directory bounds.
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= op820= op820= op820CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/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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Identify your IBM 8335 model variantCheck the system label, inventory, or BMC information to determine if the unit is model 8335 GCA, GTA, or GTBAffected if Model is 8335 GCA, GTA, or GTB and firmware version equals op820
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Check the installed firmware versionAccess the BMC/firmware management interface or use the vendor-provided management tool to query the current firmware version. Look for version string 'op820'Affected if Firmware version is exactly op820
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Verify network accessibility of firmware interfaceDetermine if the BMC or firmware management interface is exposed to network access. Check firewall rules, VLAN placement, and whether management interfaces are reachable from untrusted networksAffected if Management interface is network-accessible from outside trusted segments
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Inspect logs for path traversal requestsReview firmware management interface access logs and audit trails for URL patterns containing '../' sequences or unexpected file deletion operationsAffected if Logs show URL requests with path traversal sequences or unauthorized file deletion attempts
You are affected if you run IBM 8335 GCA, GTA, or GTB firmware version op820 with an exposed management interface, as this is the exact affected configuration for this directory traversal 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 dataApply the vendor-supplied firmware update for LC-class Systems. If immediate patching is not possible, restrict network access to the firmware management interfaces and monitor for suspicious URL patterns containing path traversal sequences.
- 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-2021-29695 — 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-2021-29695 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
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