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TI-2018-05457 Aliases CVE-2018-7549GHSA-mfcw-g327-phj2

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

Priority LOW 38CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 10 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

Why it matters now

EPSS 0.02591 85th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 10 fixed, 1 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 · 7

CPEVersionsRoleVendor
cpe:2.3:a:zsh:zsh:*:*:*:*:*:*:*:*up to 5.4.2Vulnerablezsh
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
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:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
  • cpe:2.3:a:zsh:zsh:*:*:*:*:*:*:*:* Versions up to 5.4.2 Vulnerable ·zsh
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • 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:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical

Remediation

Red Hat 1 advisory

  • RHSA-2018:3073 Released 2018-10-30 · Red Hat rating Moderate
    zsh security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) zsh-5.0.2-31.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) zsh-html-5.0.2-31.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) zsh-5.0.2-31.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) zsh-html-5.0.2-31.el7
    • Red Hat Enterprise Linux Server (v. 7) zsh-5.0.2-31.el7
    • Red Hat Enterprise Linux Server Optional (v. 7) zsh-html-5.0.2-31.el7
    • Red Hat Enterprise Linux Workstation (v. 7) zsh-5.0.2-31.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) zsh-html-5.0.2-31.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) zsh-5.0.2-31.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) zsh-html-5.0.2-31.el7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3073
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:3073
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-7549
  2. 2026-10-03 Alias added: GHSA-mfcw-g327-phj2

References

Patch 1

Advisory 3

Sources

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