CVE-2024-9398 — Observable Discrepancy in Mozilla Firefox

CWE-203 — Observable Discrepancy13 documents8 sources
Severity
5.3MEDIUMNVD
OSV9.8
EPSS
0.8%
top 25.80%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedOct 1
Latest updateFeb 2

Description

By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages8 packages

▶CVEListV5mozilla/firefoxunspecified — 131
▶NVDmozilla/firefox< 131.0
▶CVEListV5mozilla/firefox_esrunspecified — 128.3
▶CVEListV5mozilla/thunderbirdunspecified — 128.3+1
▶NVDmozilla/firefox_esr< 128.3.0

🔴Vulnerability Details

4
OSV
firefox vulnerabilities↗2024-10-07
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CVEList
CVE-2024-9398: By checking the result of calls to `window↗2024-10-01
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OSV
CVE-2024-9398: By checking the result of calls to `window↗2024-10-01
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GHSA
GHSA-3qpq-hc75-5535: By checking the result of calls to `window↗2024-10-01
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
▶
Ubuntu
Firefox vulnerabilities↗2024-10-07
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Red Hat
firefox: thunderbird: External protocol handlers could be enumerated via popups↗2024-10-01
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Debian
CVE-2024-9398: firefox - By checking the result of calls to `window.open` with specifically set protocol ...↗2024
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Mozilla
Mozilla Foundation Security Advisory 2024-47: CVE-2024-9398↗
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CVE-2024-9398 — Observable Discrepancy in Mozilla | cvebase