Security readout for executives and security teams
Plain-English summary
This vulnerability can make GENIVI dlt-daemon crash when dlt.conf contains special characters. The business impact is loss of diagnostic logging, not data theft or code execution. Systems relying on DLT logs could lose operational visibility during incidents or troubleshooting.
Executive priority
Treat as a moderate operational resilience issue. Prioritize environments where DLT logging supports safety, fleet diagnostics, production troubleshooting, or incident response, because the main risk is losing visibility when logs are needed.
Technical view
CVE-2021-29507 is CWE-20 input validation weakness in GENIVI dlt-daemon versions greater than 2.10.0 through 2.18.6. A malformed configuration file can crash a vulnerable component and prevent applications using that configuration from generating DLT logs. The advisory stated no patch existed at publication.
Likely exposure
Exposure is most likely in automotive, embedded, or Linux-based environments using GENIVI Diagnostic Log and Trace with affected dlt-daemon versions and writable or poorly controlled dlt.conf configuration files.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates low complexity, network attack vector, low privileges, and user interaction, with high availability impact only.
Researcher notes
Evidence supports denial of service through configuration parsing, not confidentiality or integrity compromise. Patch status is incomplete beyond the publication statement that no patch existed. Avoid assuming exploit availability, affected downstream products, or later fixed versions without current vendor confirmation.
Mitigation direction
- Identify systems using GENIVI dlt-daemon versions greater than 2.10.0 through 2.18.6.
- Restrict write access to dlt.conf and related configuration management paths.
- Manually review dlt.conf integrity and remove unexpected special characters.
- Preserve known-good configuration templates for affected deployments.
- Monitor vendor advisory for patch or revised workaround guidance.
Validation and detection
- Confirm installed dlt-daemon versions against the affected range.
- Review configuration repositories and deployed dlt.conf files for unexpected special characters.
- Check logs or monitoring for dlt-daemon crashes and missing DLT log generation.
- Verify only trusted administrators can modify DLT configuration files.
- Track whether the vendor has released fixed versions since the advisory.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-29507 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H2.13.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/GENIVI/dlt-daemon/security/advisories/GHSA-7cqp-2hqj-mh3fCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.