CVE-2024-7538
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 · uneditedoFono CUSD AT Command Stack-based Buffer Overflow Code Execution Vulnerability. This vulnerability allows local attackers to execute arbitrary code on affected installations of oFono. An attacker must first obtain the ability to execute code on the target modem in order to exploit this vulnerability. The specific flaw exists within the parsing of responses from AT Commands. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-23190.
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 confidenceStack-based buffer overflow vulnerability in oFono's CUSD (Call-Related Supplementary Services) AT Command parser. The flaw exists in the parsing of AT command responses where user-supplied data length is not validated before being copied to a fixed-size stack buffer, allowing arbitrary code execution in root context.
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= 1.34CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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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Verify oFono is installedRun `ofono --version` or check your package manager (e.g., `dpkg -l | grep ofono`, `rpm -qa | grep ofono`)Affected if oFono is not installed, the system is not affected by this vulnerability
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Confirm oFono version is 1.34Compare the installed version output to the affected version 1.34 - note the vulnerability affects only version 1.34Affected if Installed version is not 1.34, the system is not affected by this specific CVE
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Check if oFono daemon is runningRun `ps aux | grep ofono` or `systemctl status ofono` to see if the ofonod process is activeAffected if ofono daemon is not running, the vulnerable code path is not active
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Verify CUSD module is in useCheck for active modems using oFono with CUSD support - look for ofono log files, configuration in /etc/ofono, or check if modems are registered with ofono (e.g., `dbus-send --system --dest=org.ofono / | grep modem`)Affected if No modems are configured or managed by ofono, the vulnerable CUSD parser is not being invoked
System is affected only if oFono version 1.34 is installed, the ofono daemon is running, and modems using CUSD functionality are actively managed by ofono.
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 patch for oFono; limit local modem access to trusted processes since exploitation requires prior code execution capability on the target modem.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-7538 — 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-2024-7538 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
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