THREATPORT/VULNERABILITY/CVE-2017-18926
HIGH SEVERITY

CVE-2017-18926

Raptor Rdf Syntax Library vulnerability

CVSS
7.1
EPSS
3.1%
EPSS pct
86th
Exploited
No known
raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).
Affected vendor
Librdf
Affected product
Raptor Rdf Syntax Library
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Weakness type (CWE)
Published
2020-11-06

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to integrity, high impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2017-18926

  • Confirm whether Librdf Raptor Rdf Syntax Library is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-18926.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-18926

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-18926 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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