CVE-2017-15130 Denial of service in dovecot
An attacker can cause excessive memory usage and service restarts in Dovecot by generating random TLS SNI server names.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-15130?
CVE-2017-15130 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 2 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the process to restart.
Weakness: CWE-400
Which versions are affected by CVE-2017-15130?
It affects 3 products.
Linux distribution packages (11)
dovecot22 SUSE:Enterprise Storage 4 | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server 12 SP1-LTSS | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server 12 SP2-LTSS | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server 12 SP3 | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server 12-LTSS | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server for SAP Applications 12 SP1 | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 2.2.31-19.11.1 |
dovecot22 SUSE:OpenStack Cloud 7 | All versions | 2.2.31-19.11.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Dovecot Dovecot.
How do I fix CVE-2017-15130?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-15130 being exploited?
There is no known exploitation of CVE-2017-15130 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2017-15130, DEBIAN-CVE-2017-15130, GHSA-36px-qc55-gxh7, SUSE-SU-2018:2632-1, SUSE-SU-2018:2632-2, UBUNTU-CVE-2017-15130.