CVE-2024-0746 in Thunderbird
Summary
by MITRE • 01/23/2024
A Linux user opening the print preview dialog could have caused the browser to crash. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.
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Analysis
by VulDB Data Team • 06/19/2025
This vulnerability represents a critical stability issue within Mozilla's browser and email client software that could be exploited through routine user interactions. The flaw manifests when a linux user attempts to access the print preview functionality within Firefox or Thunderbird applications, causing the affected software to experience a crash. The vulnerability specifically impacts versions prior to Firefox 122 and Firefox ESR 115.7, as well as Thunderbird versions below 115.7, indicating a widespread concern across multiple Mozilla products that share underlying codebases. The technical nature of this issue suggests a memory corruption or improper handling of print-related data structures that occurs during the print preview rendering process.
The operational impact of this vulnerability extends beyond simple application instability, as it could be leveraged by malicious actors to disrupt user workflows or potentially escalate into more serious exploits. When a user opens the print preview dialog, the application processes various graphical elements and formatting information that may trigger memory access violations or stack corruption. This type of vulnerability falls under the category of denial of service through application crash, but could potentially be chained with other exploits if the underlying memory corruption allows for arbitrary code execution. The vulnerability is particularly concerning in enterprise environments where users regularly utilize print preview functionality and where such crashes could disrupt productivity or serve as a vector for more sophisticated attacks.
From a cybersecurity perspective, this vulnerability aligns with common weakness patterns identified in the CWE database, specifically relating to improper handling of input data and memory management issues that can lead to application instability. The ATT&CK framework would categorize this vulnerability under the T1499.004 technique for network denial of service, though it could potentially be extended to T1059 if the crash scenario leads to execution of malicious code through compromised user sessions. The vulnerability's exploitation requires minimal user interaction, making it particularly dangerous as it only requires a user to open a print preview dialog, which is a common operation that users perform regularly. This characteristic places the vulnerability in a high-risk category for both individual users and enterprise environments where automated processes might trigger print operations.
The recommended mitigation strategy centers on immediate software updates to patched versions of Firefox, Firefox ESR, and Thunderbird to address the underlying memory handling issues in the print preview implementation. Organizations should implement rapid deployment of these security patches across all affected systems, particularly in environments where users have elevated privileges or where the applications are used for sensitive operations. Additionally, temporary workarounds such as disabling print preview functionality or implementing user access controls to limit exposure could be considered while waiting for comprehensive patch deployment. Security monitoring should focus on identifying any attempts to exploit this vulnerability through unexpected application crashes or user behavior patterns that might indicate malicious intent. Regular vulnerability assessments should be conducted to ensure that similar issues do not arise in other components of the software stack, particularly those involving graphical rendering and print handling capabilities.