Debian Security Advisory

DLA-1991-1 libssh2 -- LTS security update

Date Reported:
13 Nov 2019
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 943562.
In Mitre's CVE dictionary: CVE-2019-17498.
More information:

In libssh2, SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server

For Debian 8 Jessie, this problem has been fixed in version 1.4.3-4.1+deb8u6.

We recommend that you upgrade your libssh2 packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: