Vulnerability identifier: #VU34380

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3811

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
netqmail
Server applications / Mail servers
Debian Linux
Operating systems & Components / Operating system

Vendor: qmail
Debian

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

qmail-verify as used in netqmail 1.06 is prone to a mail-address verification bypass vulnerability.

Mitigation
Install update from vendor's website.

Vulnerable software versions

netqmail: 1.06

Debian Linux: 1.06 - 9.0

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External links
http://bugs.debian.org/961060
http://lists.debian.org/debian-lts-announce/2020/06/msg00002.html
http://www.debian.org/security/2020/dsa-4692
http://www.openwall.com/lists/oss-security/2020/05/19/8

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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.