The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a database and tools to fix them.

computer vulnerability note 8702

qmailAdmin, vpopmail: bypassing quotas

Synthesis of the vulnerability

When the administrator defined quotas over 2Gb, they are not honoured by qmailAdmin and vpopmail.
Severity of this threat: 1/4.
Creation date: 11/05/2009.
Références of this weakness: VIGILANCE-VUL-8702.
Full Vigil@nce bulletin... (Free trial)

Description of the vulnerability

The vpopmail program is used to create virtual mailboxes. The qmailAdmin program is used to manage a qmail or vpopmail messaging system.

The administrator can define a quota in qmailAdmin and vpopmail in order to limit the size of users' mailboxes.

However, these quotas are stored in a signed 32 bit integer. The maximal value is thus 2^31-1 = 2147483647 = 2Go. If the administrator defined a superior value, it is not honoured. The mailbox size is therefore not limited.

When the administrator defined quotas over 2Gb, they are thus not honoured by qmailAdmin and vpopmail.
Full Vigil@nce bulletin... (Free trial)

This computer vulnerability announce impacts software or systems such as Unix (platform) ~ not comprehensive.

Our Vigil@nce team determined that the severity of this cybersecurity bulletin is low.

The trust level is of type unique source, with an origin of user account.

An attacker with a expert ability can exploit this threat alert.

Solutions for this threat

qmailAdmin, vpopmail: workaround for quotas.
A workaround is to not define quotas over 2Gb.
Full Vigil@nce bulletin... (Free trial)

Computer vulnerabilities tracking service

Vigil@nce provides computer vulnerability bulletins. The Vigil@nce vulnerability database contains several thousand vulnerabilities. The technology watch team tracks security threats targeting the computer system. The Vigil@nce computer vulnerability tracking service alerts your teams of vulnerabilities or threats impacting your information system.