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CVE-2020-3812

Published: 26 May 2020

qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.

From the Ubuntu Security Team

It was discovered that netqmail did not properly handle certain input when validating email addresses. An attacker could use this vulnerability to cause netqmail to disclose sensitive information.

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
netqmail
Launchpad, Ubuntu, Debian
bionic
Released (1.06-6.2~deb10u1build0.18.04.1)
eoan Ignored
(end of life)
focal
Released (1.06-6.2~deb10u1build0.20.04.1)
groovy Does not exist

trusty
Released (1.06-6.2~deb10u1build0.14.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (1.06-6.2, 1.6-6.2~deb10u1, 1.6-6.2~deb9u1, 1.6-6.2~deb8u1,,,)
xenial
Released (1.06-6.2~deb10u1build0.16.04.1)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N