Vulnerability DatabaseCVE-2019-3857
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CVE-2019-3857
Published:March 25, 2019
Updated:May 17, 2026
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.
Related Resources (21)
https://seclists.org/bugtraq/2019/Apr/25
https://security.alpinelinux.org/vuln/CVE-2019-3857
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://security.netapp.com/advisory/ntap-20190327-0005/
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-3857
https://www.libssh2.org/CVE-2019-3857.html
https://access.redhat.com/security/cve/CVE-2019-3857
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
https://access.redhat.com/errata/RHSA-2019:1175
https://access.redhat.com/errata/RHSA-2019:2399
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3857
https://access.redhat.com/errata/RHSA-2019:1652
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
https://security-tracker.debian.org/tracker/CVE-2019-3857
https://access.redhat.com/errata/RHSA-2019:1943
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
https://access.redhat.com/errata/RHSA-2019:0679
https://www.debian.org/security/2019/dsa-4431
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
https://access.redhat.com/errata/RHSA-2019:1791
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
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CVSS v4
Base Score:
7.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Integer Overflow or Wraparound
CWE-190
Out-of-bounds Write
CWE-787
EPSS
Base Score:
4.54