CVE-2024-21452
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 · uneditedTransient DOS while decoding an ASN.1 OER message containing a SEQUENCE of unknown extensions.
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 confidenceA transient denial of service vulnerability exists in ASN.1 OER (Octet Encoding Rules) decoding when processing messages containing a SEQUENCE of unknown extensions, causing the decoder to fail unexpectedly during parsing.
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 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 Qualcomm firmware productCheck system information, firmware metadata, or modem configuration to determine if the device uses any of these products: Qualcomm C V2x 9150, Qca6584au, Qca6698aq, Snapdragon Auto 5g Modem Rf, Snapdragon Auto 5g Modem Rf Gen 2, or Snapdragon Auto 4g Modem. Consult the modem or firmware version via AT commands (e.g., AT+CGMR), sysfs, or vendor documentation.Affected if The installed firmware corresponds to any of the listed Qualcomm products.
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Verify OER decoding is in useInspect application logs, configuration files, or network trace settings to determine if the system performs ASN.1 OER (Octet Encoding Rules) decoding. Look for OER-specific parser or codec modules in the software stack.Affected if OER decoding functionality is enabled or loaded in the system.
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Confirm message processing includes SEQUENCE typesMonitor or review the traffic/ message handling code to see if the system processes ASN.1 SEQUENCE messages, particularly those that may contain extension fields. Check if the decoder handles unknown extension tags.Affected if The system parses SEQUENCE messages with potentially unknown extension fields via OER.
If the environment uses any of the listed Qualcomm firmware products with OER decoding enabled for SEQUENCE messages, the system 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 dataApply vendor patches to the affected ASN.1 library or application that implements OER decoding to properly handle SEQUENCE types with unknown extensions without crashing.
- Consultation4.0 h
- Implementation8.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-21452 — 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-2024-21452 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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