CVE-2020-15917 Security feature bypass in n/a
Attackers can bypass TLS encryption in Claws Mail by mishandling protocol suffix data after STARTTLS, exposing email communications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-15917?
CVE-2020-15917 is a critical vulnerability in Fedoraproject Fedora, published on 23 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mishandled.
Which versions are affected by CVE-2020-15917?
It affects 4 products.
Linux distribution packages (12)
claws-mail SUSE:Package Hub 15 SP1 | All versions | 3.17.3-bp151.3.3.1 |
claws-mail SUSE:Package Hub 15 SP1 | All versions | 3.17.8-bp152.3.6.1 |
claws-mail SUSE:Package Hub 15 SP2 | All versions | 3.17.6-bp152.3.3.1 |
claws-mail SUSE:Package Hub 15 SP2 | All versions | 3.17.8-bp152.3.6.1 |
claws-mail SUSE:Package Hub 15 SP2 | All versions | 3.18.0-bp153.2.3.1 |
claws-mail SUSE:Package Hub 15 SP3 | All versions | 3.18.0-bp153.2.3.1 |
claws-mail openSUSE:Leap 15.1 | All versions | 3.17.3-lp151.2.3.1 |
claws-mail openSUSE:Leap 15.1 | All versions | 3.17.8-bp152.3.6.1 |
claws-mail openSUSE:Leap 15.2 | All versions | 3.17.6-lp152.3.3.1 |
claws-mail openSUSE:Leap 15.2 | All versions | 3.17.8-bp152.3.6.1 |
claws-mail openSUSE:Leap 15.2 | All versions | 3.18.0-bp153.2.3.1 |
claws-mail openSUSE:Leap 15.3 | All versions | 3.18.0-bp153.2.3.1 |
Products include Claws-Mail Claws-Mail, Fedoraproject Fedora, Opensuse Backports Sle, Opensuse Leap.
How do I fix CVE-2020-15917?
Upgrade to a fixed version.
Is CVE-2020-15917 being exploited?
There is no known exploitation of CVE-2020-15917 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as CLEANSTART-2023-MR39642, DEBIAN-CVE-2020-15917, GHSA-9rxj-vjg6-w53x, MGASA-2020-0321, UBUNTU-CVE-2020-15917, openSUSE-SU-2020:1116-1 and 5 more.