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CVE-2019-3857

Published: 25 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 SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. 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 incorrectly handled SSH_MSG_CHANNEL_REQUEST packets. A remote attacker could possibly use this issue to execute arbitrary code.

Priority

Medium

CVSS 3 base score: 8.8

Status

Package Release Status
libssh2
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(reached 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)
precise Does not exist

trusty Needed

upstream Needs triage

xenial Ignored
(end of standard support, was needed)