Mozilla Firefox up to 111 on Windows Extension Remote Code Execution

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Mozilla Firefox up to 111 on Windows. Affected by this issue is some unknown functionality of the component Extension Handler. The manipulation results in an unknown weakness. This vulnerability is identified as CVE-2023-29542. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 111 on Windows (Web Browser). It has been classified as critical. Affected is an unknown functionality of the component Extension Handler. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released 04/11/2023 by Shaheen Fazim and Ameen Basha M K as Bug 1815062 as confirmed advisory (Website). The advisory is shared for download at bugzilla.mozilla.org. The advisory contains:

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 on Windows. Other versions of Firefox are unaffected.
This vulnerability is traded as CVE-2023-29542. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/11/2024).

Upgrading to version 112 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.5

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Remote Code Execution
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Firefox 112

Timelineinfo

04/07/2023 🔍
04/11/2023 +4 days 🔍
04/11/2023 +0 days 🔍
04/14/2023 +3 days 🔍
04/27/2025 +744 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: Bug 1815062
Researcher: Shaheen Fazim, Ameen Basha M K
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-29542 (🔍)
GCVE (CVE): GCVE-0-2023-29542
GCVE (VulDB): GCVE-100-225996

Entryinfo

Created: 04/14/2023 16:34
Updated: 04/27/2025 10:18
Changes: 04/14/2023 16:34 (17), 04/14/2023 16:38 (29), 05/03/2023 12:13 (1), 12/11/2024 17:34 (35), 04/27/2025 10:18 (3)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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