CVE-2023-29542

2023-06-1911:15:09

[email protected]

web.nvd.nist.gov

cve-2023-29542

file extension bypass

malicious code execution

windows

firefox

thunderbird

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

41.0%

JSON

A newline in a filename could have been used to bypass the file extension security mechanisms that replace malicious file extensions such as .lnk with .download. This could have led to accidental execution of malicious code.

This bug only affects Firefox and Thunderbird on Windows. Other versions of Firefox and Thunderbird are unaffected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.