#VU73749 Buffer overflow in Firefox ESR and Mozilla Thunderbird - CVE-2022-42432

Vulnerability identifier: #VU73749

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-42432

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Firefox ESR
Client/Desktop applications / Web browsers
Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to memory safety bugs. A remote unauthenticated attacker can trick the victim into opening a specially crafted file, trigger buffer overflow and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox ESR: 102.3.0

Mozilla Thunderbird: 102.3.0

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External links
https://www.dell.com/support/kbdoc/nl-nl/000211140/dsa-2023-107-dell-vxrail-security-update-for-multiple-third-party-component-vulnerabilities-7-0-xxx

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.