Vulnerability identifier: #VU84565

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-6862

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Firefox ESR
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to crash the browser.

The vulnerability exists due to a use-after-free error in nsDNSService::Init during browser startup. A remote attacker with control over the DNS server can cause the browser to crash.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox ESR: 115.0 - 115.5.0

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2023-54/

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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.