#VU25128 NULL pointer dereference in Mozilla Thunderbird


Published: 2020-02-11

Vulnerability identifier: #VU25128

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6795

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when processing messages with multiple S/MIME signatures. A remote attacker can send a specially crafted email message tho the victim and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 68.0 - 68.4.2, 60.0 - 60.9.1


External links
http://www.mozilla.org/en-US/security/advisories/mfsa2020-07/


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.


Latest bulletins with this vulnerability