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gentooGentoo FoundationGLSA-202007-56
HistoryJul 28, 2020 - 12:00 a.m.

Claws Mail: Improper STARTTLS handling

2020-07-2800:00:00
Gentoo Foundation
security.gentoo.org
13
claws mail
starttls
integrity
confidentiality
upgrade

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

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

EPSS

0.013

Percentile

85.9%

Background

Claws Mail is a GTK based e-mail client.

Description

It was discovered that Claws Mail was not properly handling state within the STARTTLS protocol handshake.

Impact

There may be a breach of integrity or confidentiality in connections made using Claws Mail with STARTTLS.

Workaround

There is no known workaround at this time.

Resolution

All Claws Mail users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-client/claws-mail-3.17.6"
OSVersionArchitecturePackageVersionFilename
Gentooanyallmail-client/claws-mail< 3.17.6UNKNOWN

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

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

EPSS

0.013

Percentile

85.9%