NULL pointer dereference in Mozilla Thunderbird - CVE-2020-6795

Vulnerability identifier: #VU25128

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2020-6795

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Mozilla

Affected software:
Mozilla Thunderbird

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.

Install updates from vendor's website.

• https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/