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
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+esm2)
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 |