Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3661-1 firefox-esr security update
Debian DLA Debian DLA DLA-3674-1 thunderbird security update
Debian DSA Debian DSA DSA-5561-1 firefox-esr security update
Debian DSA Debian DSA DSA-5566-1 thunderbird security update
EUVD EUVD EUVD-2023-58456 Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Ubuntu USN Ubuntu USN USN-6509-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-6515-1 Thunderbird vulnerabilities
Fixes

Solution

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Workaround

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2025-02-13T17:26:12.209Z

Reserved: 2023-11-20T13:33:38.038Z

Link: CVE-2023-6209

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-11-21T15:15:07.957

Modified: 2024-11-21T08:43:22.533

Link: CVE-2023-6209

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-11-21T00:00:00Z

Links: CVE-2023-6209 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses