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CVE Record

CVE-2018-19198: An issue was discovered in uriparser before 0.9.0.

An issue was discovered in uriparser before 0.9.0. UriQuery.c allows an out-of-bounds write via a uriComposeQuery* or uriComposeQueryEx* function because the '&' character is mishandled in certain contexts.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-19198 is a memory corruption issue in uriparser before 0.9.0. Software using vulnerable query-composition functions may write outside an expected memory boundary when handling certain ampersand contexts. Business urgency depends on whether exposed products or services process untrusted URI query data through this library.

Executive priority

Treat this as a targeted dependency remediation item. It is not confirmed actively exploited in the supplied sources, but memory corruption in a parsing library can affect products indirectly. Prioritize internet-facing or data-processing services that use uriparser before 0.9.0.

Technical view

In UriQuery.c, uriComposeQuery* and uriComposeQueryEx* mishandle the '&' character in some contexts, causing an out-of-bounds write. The public sources identify uriparser before 0.9.0 and reference upstream and Linux distribution security updates. No CVSS vector is provided in the source bundle.

Likely exposure

Exposure is most likely in applications, appliances, or packages that embed or link uriparser before 0.9.0 and compose URI query strings from external or user-controlled data. Distribution-packaged systems may depend on vendor backported fixes rather than upstream version strings.

Exploitation context

The provided sources do not show active exploitation, and the CVE is not marked as CISA KEV. The bug is memory-corruption class, so risk could rise where attackers can influence query composition inputs, but exploitability details are incomplete in the bundle.

Researcher notes

Evidence supports an out-of-bounds write in query composition, not URI parsing broadly. Focus analysis on UriQuery.c and the uriComposeQuery family. Be careful with distro versions because vendor fixes may be backported without reporting upstream 0.9.0.

Mitigation direction

  • Upgrade uriparser to 0.9.0 or a vendor-patched package.
  • Review Debian and Red Hat advisories for fixed downstream package versions.
  • Inventory direct and transitive dependencies that include uriparser.
  • Prioritize remediation where URI query data is externally supplied.
  • Follow current vendor guidance if using embedded or appliance software.

Validation and detection

  • Confirm whether uriparser is present in application and system inventories.
  • Identify installed or bundled versions below 0.9.0.
  • Check whether distro packages include backported security fixes.
  • Review code paths using uriComposeQuery* or uriComposeQueryEx*.
  • Assess whether those paths process untrusted URI query data.
Prepared
Confidence
medium
Sources
6

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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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
5Source 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

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