CVE-2020-15917

high-risk

Published 2020-07-23

common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mishandled.

Do I need to act?

2.2% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Claws-Mail

Fedora

Backports Sle

Leap

Fedoraproject Opensuse Claws-Mail

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00090.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00002.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00060.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00051.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00013.html

Third Party Advisory https://security.gentoo.org/glsa/202007-56

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00090.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00002.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00060.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00051.html

Broken Link http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00013.html

Third Party Advisory https://security.gentoo.org/glsa/202007-56

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high-risk

Severity 32/34 · Critical

Exploitability 5/34 · Minimal

Exposure 14/34 · Moderate