Ubuntu update for amavisd-new

1) Protection Mechanism Failure

EUVDB-ID: #VU87553

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Amber]

CVE-ID: CVE-2024-28054

CWE-ID: CWE-693 - Protection Mechanism Failure

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to the way Amavis handles emails consisting of multiple parts (`Content-Type: multipart/*`). A remote attacker can create a specially crafted email message that can bypass antivirus scan and deliver potentially dangerous attachments to the end users.

Mitigation

Update the affected package amavisd-new to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.04

amavisd-new (Ubuntu package): before 1:2.11.0-6.1ubuntu1.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:23.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:amavisd-new_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6790-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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