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CVE Record

CVE-2019-13503: mq_parse_http in mongoose.c in Mongoose 6.15 has a heap-based buffer over-read.

mq_parse_http in mongoose.c in Mongoose 6.15 has a heap-based buffer over-read.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2019-13503 is a heap buffer over-read in Mongoose 6.15's HTTP parsing code. In business terms, software embedding this library may mishandle malformed HTTP data, potentially causing instability or exposing memory-adjacent data. The source bundle provides no CVSS score or confirmed exploitation evidence.

Executive priority

Prioritize discovery before emergency response. The issue may matter where Mongoose 6.15 is embedded in internet-facing services, but the available evidence lacks severity scoring and exploitation confirmation. Assign ownership to inventory and patch validation teams.

Technical view

The issue is reported in mq_parse_http in mongoose.c in Mongoose 6.15. Public references identify it as a heap-based buffer over-read found through API fuzzing and addressed in a GitHub pull request. The bundle does not provide CPEs, precise downstream products, exploitability details, or a named fixed release.

Likely exposure

Exposure is most likely in applications or devices that embed Mongoose 6.15 and use its HTTP parsing path. The source data does not enumerate affected vendors, CPEs, appliances, or cloud services, so confirmation requires dependency, SBOM, and source-code review.

Exploitation context

The bundle does not show CISA KEV listing, active exploitation, or a weaponized public exploit. Evidence points to discovery through fuzzing and a code-level parser defect. Treat externally reachable Mongoose-based HTTP services as higher priority until version and patch status are confirmed.

Researcher notes

Key gaps are absent CVSS data, no CPE mapping, and no named fixed release in the provided bundle. Analysis should stay code- and dependency-focused: confirm the exact Mongoose version, parser reachability, and whether the PR fix is present downstream.

Mitigation direction

  • Identify software embedding Mongoose 6.15 or vulnerable mongoose.c code.
  • Review Cesanta pull request #1035 for the vendor code change.
  • Upgrade or patch using vendor-supported guidance where available.
  • Reduce unnecessary external exposure of affected HTTP services.
  • Monitor vendor advisories for fixed release or downstream product guidance.

Validation and detection

  • Check SBOMs and source trees for Mongoose 6.15 references.
  • Compare local mongoose.c against the code change in pull request #1035.
  • Confirm whether mq_parse_http is reachable from untrusted HTTP input.
  • Review crash logs for unexplained parser or heap-read failures.
  • Document affected assets and remediation status for vulnerability management.
Prepared
Confidence
medium
Sources
4

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

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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CVE-2019-13503 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
3Source 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.