Vulnerability DatabaseCVE-2019-3855
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CVE-2019-3855
Published:March 21, 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 packets are read from the server. 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 (35)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/
https://seclists.org/bugtraq/2019/Apr/25
https://access.redhat.com/errata/RHSA-2019:1943
https://access.redhat.com/errata/RHSA-2019:1791
https://seclists.org/bugtraq/2019/Mar/25
https://security-tracker.debian.org/tracker/CVE-2019-3855
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767
https://access.redhat.com/security/cve/CVE-2019-3855
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
https://seclists.org/bugtraq/2019/Sep/49
https://www.debian.org/security/2019/dsa-4431
https://access.redhat.com/errata/RHSA-2019:0679
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-3855
https://www.libssh2.org/CVE-2019-3855.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/
https://access.redhat.com/errata/RHSA-2019:2399
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
https://security.netapp.com/advisory/ntap-20190327-0005/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/
http://www.openwall.com/lists/oss-security/2019/03/18/3
https://support.apple.com/kb/HT210609
https://access.redhat.com/errata/RHSA-2019:1652
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
https://security.alpinelinux.org/vuln/CVE-2019-3855
http://www.securityfocus.com/bid/107485
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
http://seclists.org/fulldisclosure/2019/Sep/42
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
https://access.redhat.com/errata/RHSA-2019:1175
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/
http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html
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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)
Out-of-bounds Write
CWE-787
Integer Overflow or Wraparound
CWE-190
EPSS
Base Score:
16.24