Mozilla Thunderbird up to 102.9 on Windows Save Link As Remote Code Execution

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Mozilla Thunderbird up to 102.9 on Windows. Affected is an unknown function of the component Save Link As Handler. Such manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2023-29545. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 102.9 on Windows (Mail Client Software). It has been rated as critical. Affected by this issue is an unknown function of the component Save Link As Handler. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user. *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 Axel Chong as Bug 1823077 as confirmed advisory (Website). The advisory is shared for download at bugzilla.mozilla.org. The advisory contains:

Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user. This bug only affects Thunderbird on Windows. Other versions of Thunderbird are unaffected.

This vulnerability is handled as CVE-2023-29545. 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 102.10 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Mail Client Software

Vendor

• Mozilla

Name

• Thunderbird

Version

• 102.0
• 102.1
• 102.2
• 102.3
• 102.4
• 102.5
• 102.6
• 102.7
• 102.8
• 102.9

License

• open-source

Website

• Vendor: https://www.mozilla.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Thunderbird 102.10

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

Advisory: Bug 1823077
Researcher: Axel Chong
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-29545 (🔍)
GCVE (CVE): GCVE-0-2023-29545
GCVE (VulDB): GCVE-100-226016

Entryinfo

Created: 04/14/2023 16:47
Updated: 04/27/2025 09:22
Changes: 04/14/2023 16:47 (17), 04/14/2023 16:50 (29), 05/03/2023 14:09 (1), 12/11/2024 17:34 (35), 04/27/2025 09:22 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

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