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Vulnerability Details : CVE-2019-3857

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.
Publish Date : 2019-03-25 Last Update Date : 2019-05-14
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeOverflow
CWE ID 190

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2019:0679: libssh2 security update (Important) oval:com.redhat.rhsa:def:20190679 unix
RHSA-2019:1175: virt:rhel security update (Important) oval:com.redhat.rhsa:def:20191175 unix
RHSA-2019:1652: libssh2 security update (Important) oval:com.redhat.rhsa:def:20191652 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2019-3857

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
2 Application Libssh2 Libssh2 1.2.8 Version Details Vulnerabilities
3 Application Libssh2 Libssh2 1.2.9 Version Details Vulnerabilities
4 Application Libssh2 Libssh2 1.3.0 Version Details Vulnerabilities
5 Application Libssh2 Libssh2 1.4.0 Version Details Vulnerabilities
6 Application Libssh2 Libssh2 1.4.1 Version Details Vulnerabilities
7 Application Libssh2 Libssh2 1.4.2 Version Details Vulnerabilities
8 Application Libssh2 Libssh2 1.4.3 Version Details Vulnerabilities
9 Application Libssh2 Libssh2 1.5.0 Version Details Vulnerabilities
10 Application Libssh2 Libssh2 1.6.0 Version Details Vulnerabilities
11 Application Libssh2 Libssh2 1.7.0 Version Details Vulnerabilities
12 Application Libssh2 Libssh2 1.8.0 Version Details Vulnerabilities
13 Application Netapp Ontap Select Deploy Administration Utility - Version Details Vulnerabilities
14 OS Opensuse Leap 15.0 Version Details Vulnerabilities
15 OS Opensuse Leap 42.3 Version Details Vulnerabilities
16 OS Redhat Enterprise Linux Desktop 7.0 Version Details Vulnerabilities
17 OS Redhat Enterprise Linux Server 7.0 Version Details Vulnerabilities
18 OS Redhat Enterprise Linux Server Aus 7.6 Version Details Vulnerabilities
19 OS Redhat Enterprise Linux Server Eus 7.6 Version Details Vulnerabilities
20 OS Redhat Enterprise Linux Server Tus 7.6 Version Details Vulnerabilities
21 OS Redhat Enterprise Linux Workstation 7.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 1
Libssh2 Libssh2 11
Netapp Ontap Select Deploy Administration Utility 1
Opensuse Leap 2
Redhat Enterprise Linux Desktop 1
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Server Aus 1
Redhat Enterprise Linux Server Eus 1
Redhat Enterprise Linux Server Tus 1
Redhat Enterprise Linux Workstation 1

- References For CVE-2019-3857
BUGTRAQ 20190415 [SECURITY] [DSA 4431-1] libssh2 security update
MLIST [debian-lts-announce] 20190326 [SECURITY] [DLA 1730-1] libssh2 security update[email protected]/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
FEDORA FEDORA-2019-3348cb4934
REDHAT RHSA-2019:0679
SUSE openSUSE-SU-2019:1109
SUSE openSUSE-SU-2019:1075

- Metasploit Modules Related To CVE-2019-3857

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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