GLSA 202007-56: Claws Mail: Improper STARTTLS handling

http://security.gentoo.org/

Severity:	normal
Title:	Claws Mail: Improper STARTTLS handling
Date:	07/28/2020
Bugs:	#733684
ID:	202007-56

Synopsis

A vulnerability was discovered in Claws Mail's STARTTLS handling, possibly allowing an integrity/confidentiality compromise.

Background

Claws Mail is a GTK based e-mail client.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
mail-client/claws-mail	< 3.17.6	>= 3.17.6	All supported architectures

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"

References

CVE-2020-15917

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202007-56.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.