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CVE Record

CVE-2018-20593: In Mini-XML (aka mxml) v2.12, there is stack-based buffer overflow in the scan_file function in mxmldoc.c.

In Mini-XML (aka mxml) v2.12, there is stack-based buffer overflow in the scan_file function in mxmldoc.c.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2018-20593 is a reported stack-based buffer overflow in Mini-XML, also called mxml, version 2.12. The vulnerable code is in mxmldoc.c, not broadly described as every mxml use case. The public bundle shows crash evidence, an upstream issue, and Fedora advisories, but no CVSS score or confirmed exploitation.

Executive priority

Prioritize remediation where mxml tooling processes files from users, partners, CI jobs, or external repositories. For internal-only build tooling with trusted inputs, handle through normal vulnerability management timelines. The uncertainty around exploitability argues for inventory and patching, not emergency response.

Technical view

The issue is described as a stack-based buffer overflow in scan_file within mxmldoc.c in Mini-XML v2.12. Public references include crash artifacts and an upstream GitHub issue. Fedora issued downstream advisories in 2019. The bundle does not provide detailed affected CPEs, exploitability analysis, or a named upstream fixed version.

Likely exposure

Exposure is most likely where Mini-XML v2.12 or affected downstream packages are installed, especially if mxmldoc processes untrusted or externally supplied files. The bundle does not prove that all applications embedding libmxml are exploitable through normal application XML parsing paths.

Exploitation context

The sources support a crash-level memory-safety vulnerability report, not active exploitation. CISA KEV status is false in the bundle, and no cited source confirms in-the-wild attacks. Stack overflows can be serious, but practical exploitability is not established here.

Researcher notes

Key gaps are missing CVSS, absent CWE mapping, incomplete affected-product metadata, and no explicit upstream fixed version in the supplied bundle. Focus research on the upstream issue, crash reports, and downstream patches to determine reachable code paths and whether the vulnerable mxmldoc function is shipped or invoked.

Mitigation direction

  • Inventory Mini-XML or mxml packages and embedded copies across build and runtime environments.
  • Apply vendor or distribution updates, including relevant Fedora advisory updates where applicable.
  • Check upstream Mini-XML guidance for the fixed release or commit before pinning versions.
  • Avoid processing untrusted files with mxmldoc until affected versions are removed.
  • Track any products that bundle mxml separately from operating-system packages.

Validation and detection

  • Confirm whether installed or bundled mxml versions include Mini-XML v2.12.
  • Determine whether mxmldoc is present, reachable, or used in automated workflows.
  • Review package manager advisory history for Fedora or other relevant distributions.
  • Verify updated systems no longer report the vulnerable package version.
  • Use benign regression inputs to confirm documentation generation still works after updates.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2018-20593 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.