Vulnerability-Lookup

CVE-2017-18206 (GCVE-0-2017-18206)

Vulnerability from cvelistv5 – Published: 2018-02-27 22:00 – Updated: 2024-08-05 21:13

Summary

In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.

Severity

9.8 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

Assigner

mitre

References

6 references

URL	Tags
https://usn.ubuntu.com/3593-1/	vendor-advisoryx_refsource_UBUNTU
https://security.gentoo.org/glsa/201805-10	vendor-advisoryx_refsource_GENTOO
https://access.redhat.com/errata/RHSA-2018:1932	vendor-advisoryx_refsource_REDHAT
https://sourceforge.net/p/zsh/code/ci/c7a9cf465dd…	x_refsource_MISC
https://access.redhat.com/errata/RHSA-2018:3073	vendor-advisoryx_refsource_REDHAT
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Date Public

2018-02-27 00:00

Show details on NVD website

JSON

To clipboard

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      "current_release_date": "2026-06-27T04:29:28+00:00",
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      "id": "CVE-2017-18206",
      "initial_release_date": "2017-05-09T00:00:00+00:00",
      "product_status:fixed": "85",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "zsh: buffer overrun in symlinks",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-18206.json",
      "version": "3"
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      "current_release_date": "2025-09-29T02:04:54Z",
      "cve": "CVE-2017-18206",
      "id": "CVE-2017-18206",
      "initial_release_date": "2023-02-15T04:36:00Z",
      "product_status:known_not_affected": "49",
      "product_status:recommended": "9",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2017-18206",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2017-18206.json",
      "version": "13"
    }
  }
}

ubuntu-cve-2017-18206

Vulnerability from osv_ubuntu

Published

2018-02-27 00:00

Modified

2026-04-22 07:38

Summary

Details

In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.

Severity

9.8 (Critical)


                    
                      CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2017-18206	REPORT
	https://sourceforge.net/p/zsh/code/ci/c7a9cf465dd…	REPORT
	https://ubuntu.com/security/notices/USN-3593-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2017-18206	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "zsh",
            "binary_version": "5.1.1-1ubuntu2.1"
          },
          {
            "binary_name": "zsh-common",
            "binary_version": "5.1.1-1ubuntu2.1"
          },
          {
            "binary_name": "zsh-static",
            "binary_version": "5.1.1-1ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "zsh",
        "purl": "pkg:deb/ubuntu/zsh@5.1.1-1ubuntu2.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.1.1-1ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.1.1-1ubuntu1",
        "5.1.1-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.",
  "id": "UBUNTU-CVE-2017-18206",
  "modified": "2026-04-22T07:38:26Z",
  "published": "2018-02-27T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-18206"
    },
    {
      "type": "REPORT",
      "url": "https://sourceforge.net/p/zsh/code/ci/c7a9cf465dd620ef48d586026944d9bd7a0d5d6d"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3593-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2017-18206"
    }
  ],
  "related": [
    "USN-3593-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2017-18206"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2017-18206 (GCVE-0-2017-18206)

ubuntu-cve-2017-18206

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature