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gentooGentoo FoundationGLSA-201906-01
HistoryJun 06, 2019 - 12:00 a.m.

Exim: Remote command execution

2019-06-0600:00:00
Gentoo Foundation
security.gentoo.org
139

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

0.974 High

EPSS

Percentile

99.9%

Background

Exim is a message transfer agent (MTA) designed to be a a highly configurable, drop-in replacement for sendmail.

Description

A vulnerability was discovered in how Exim validates recipient addresses in the deliver_message() function.

Impact

A remote attacker could execute arbitrary commands by sending an email with a specially crafted recipient address to the affected system.

Workaround

There is no known workaround at this time.

Resolution

All Exim users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.92"
OSVersionArchitecturePackageVersionFilename
Gentooanyallmail-mta/exim< 4.92UNKNOWN

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

0.974 High

EPSS

Percentile

99.9%