Security readout for executives and security teams
Plain-English summary
CVE-2018-3848 is a high-severity flaw in NASA CFITSIO 3.42. A malicious FIT image can crash or compromise software that parses it through the vulnerable library. Risk is highest where untrusted scientific image files are accepted, exchanged, or automatically processed.
Executive priority
Treat this as a prioritized remediation item where CFITSIO processes external files. The business concern is compromise through a malicious scientific image, not broad internet scanning. Urgency depends on whether untrusted FIT files enter production workflows.
Technical view
Talos reported a stack-based buffer overflow in the ffghbn function of NASA CFITSIO 3.42. A specially crafted FIT image can overwrite arbitrary stack data and may lead to code execution. The CVSS 3.0 score is 8.8 with network attack vector, no privileges, and required user interaction.
Likely exposure
Exposure is likely limited to systems, applications, pipelines, or Linux packages using NASA CFITSIO 3.42 to parse FIT images. Scientific, astronomy, imaging, archive, or automated file-ingestion workflows should be checked first.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires delivery of a crafted FIT image and parsing by vulnerable CFITSIO-dependent software. Potential impact is high because the CVE description states possible code execution.
Researcher notes
Focus validation on CFITSIO 3.42 and the ffghbn parsing path. The sources identify memory corruption and possible code execution, but the bundle does not provide safe patch-version detail or evidence of active exploitation.
Mitigation direction
- Inventory applications and packages that use NASA CFITSIO 3.42.
- Apply relevant vendor or distribution security updates where available.
- Check Talos, Fedora, Gentoo, and upstream guidance before choosing a fixed version.
- Limit or isolate processing of untrusted FIT images until remediation is confirmed.
- Run file parsers with least privilege and appropriate process isolation.
Validation and detection
- Confirm installed CFITSIO versions across hosts, containers, and build dependencies.
- Map FIT image ingestion paths to applications using CFITSIO.
- Verify vendor or distribution packages include the security fix.
- Review logs for crashes during FIT image parsing.
- Confirm untrusted file processing is sandboxed or otherwise isolated.
Public sources used
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-3848 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- FEDORA-2019-3c1aed2aa9CVE reference · vendor-advisory, x_refsource_FEDORA
- GLSA-202101-24CVE reference · vendor-advisory, x_refsource_GENTOO
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0531CVE reference · x_refsource_MISC
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.