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The vulnerability CVE-2025-14333 is a collection of memory safety bugs identified in specific versions of Mozilla Firefox, Firefox ESR, Thunderbird, and Thunderbird ESR. These bugs, found in versions like Firefox ESR 140.5 and Firefox 145, are flaws in how the software manages memory operations, such as writing data to memory buffers. The core weakness is classified as an out-of-bounds write (CWE-787), where the software writes data past the end, or before the beginning, of the intended buffer in memory. This incorrect memory operation can corrupt valid data structures or executable code that resides adjacent to the buffer in the process’s memory space.
Evidence confirmed that some of these bugs resulted in memory corruption. While complex, analysts presume that a skilled attacker could potentially manipulate this corruption. By carefully crafting the corrupted memory layout, an attacker might hijack the normal flow of the program’s execution. This manipulation could ultimately allow the attacker to execute arbitrary code on the victim’s system with the privileges of the user running the vulnerable browser or email client. The attack vector is network-based, requiring no user interaction or privileges but posing high attack complexity.
Platform: Mozilla products
Version: < 146
Vulnerability: Memory corruption
Severity: High
date: 2025-12-09
Prediction: 2025-12-09
What Undercode Say:
`firefox –version`
`thunderbird –version`
`sudo apt update && sudo apt upgrade firefox-esr`
`sudo yum update firefox`
`sudo dnf upgrade –refresh thunderbird`
`sudo zypper update MozillaFirefox`
How Exploit:
Network attack vector.
High complexity.
Memory corruption.
Arbitrary code execution.
Protection from this CVE
Update Firefox.
Update Thunderbird.
Apply patches.
Impact
Arbitrary code execution.
Full system compromise.
Data theft.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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