Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2019-3855

Published: 21 March 2019

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

From the Ubuntu Security Team

It was discovered that libssh2 mishandled certain input. If libssh2 were used to connect to a malicious or compromised SSH server, a remote, unauthenticated attacker could execute arbitrary code on the client system.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
libssh2
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(end of life)
disco Not vulnerable
(1.8.0-2.1)
eoan Not vulnerable
(1.8.0-2.1)
focal Not vulnerable
(1.8.0-2.1)
groovy Not vulnerable
(1.8.0-2.1)
hirsute Not vulnerable
(1.8.0-2.1)
impish Not vulnerable
(1.8.0-2.1)
jammy Not vulnerable
(1.8.0-2.1)
kinetic Not vulnerable
(1.8.0-2.1)
lunar Not vulnerable
(1.8.0-2.1)
mantic Not vulnerable
(1.8.0-2.1)
noble Not vulnerable
(1.8.0-2.1)
trusty
Released (1.4.3-2ubuntu0.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial
Released (1.5.0-2ubuntu0.1+esm1)
Available with Ubuntu Pro

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H