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TI-2018-13196 Aliases CVE-2018-18661GHSA-49q9-9f29-jccf

An issue was discovered in LibTIFF 4.0.9.

Priority LOW 34CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 8 fixed, 2 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

An issue was discovered in LibTIFF 4.0.9. There is a NULL pointer dereference in the function LZWDecode in the file tif_lzw.c.

Why it matters now

EPSS 0.0287 86th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 8 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:libtiff:libtiff:4.0.9:*:*:*:*:*:*:*4.0.9Vulnerablelibtiff
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
  • cpe:2.3:a:libtiff:libtiff:4.0.9:*:*:*:*:*:*:* Versions 4.0.9 Vulnerable ·libtiff
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical

Remediation

Red Hat 1 advisory

  • RHSA-2019:2053 Released 2019-08-06 · Red Hat rating Moderate
    libtiff security update
    • Red Hat Enterprise Linux Client (v. 7) libtiff-4.0.3-32.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) libtiff-devel-4.0.3-32.el7, libtiff-static-4.0.3-32.el7, libtiff-tools-4.0.3-32.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) libtiff-4.0.3-32.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libtiff-devel-4.0.3-32.el7, libtiff-static-4.0.3-32.el7, libtiff-tools-4.0.3-32.el7
    • Red Hat Enterprise Linux Server (v. 7) libtiff-4.0.3-32.el7, libtiff-4.0.3-32.el7.ppc, libtiff-devel-4.0.3-32.el7 +1
    • Red Hat Enterprise Linux Server Optional (v. 7) libtiff-static-4.0.3-32.el7, libtiff-static-4.0.3-32.el7.ppc, libtiff-tools-4.0.3-32.el7
    • Red Hat Enterprise Linux Workstation (v. 7) libtiff-4.0.3-32.el7, libtiff-devel-4.0.3-32.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libtiff-static-4.0.3-32.el7, libtiff-tools-4.0.3-32.el7

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2053
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2053
Not affected: 2 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-18661
  2. 2026-10-03 Alias added: GHSA-49q9-9f29-jccf

References

Exploit 1

Advisory 2

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences