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No exploitation reportedFix available

CVE-2018-18456

No exploitation reported by the sources we read.

  • Published2018-10-18
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Timeline

dates in UTC
  1. 2018-10-1806:29CVE publishedNVD

Versions per branch

NVD
Xpdfreader xpdf
BranchAffectedFixed in
4.0= 4.00no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ipeUbuntu:26.10all versions · no fixed version listedand 1 other package
  • ipeUbuntu:26.04:LTSall versions · no fixed version listedand 1 other package
  • ipeUbuntu:25.10all versions · no fixed version listedand 1 other package
  • ipeUbuntu:24.04:LTSall versions · no fixed version listedand 1 other package
  • ipeUbuntu:22.04:LTSall versions · no fixed version listedand 1 other package
  • ipeUbuntu:20.04:LTSall versions · no fixed version listed
  • ipeUbuntu:18.04:LTSall versions · no fixed version listedand 1 other package
  • ipeUbuntu:16.04:LTSall versions · no fixed version listedand 1 other package

7 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2018-10-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-cjwm-4p9f-wr64

Frequently asked questions

What is CVE-2018-18456?

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

Is CVE-2018-18456 actively exploited?

Active exploitation of CVE-2018-18456 has not been confirmed. Its EPSS score was 1.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-18456?

CVE-2018-18456 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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