Description
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.
Published: 2019-03-21
Score: 8.8 High
EPSS: 16.2% Moderate
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1730-1 libssh2 security update
Debian DLA Debian DLA DLA-1730-3 libssh2 regression update
Debian DSA Debian DSA DSA-4431-1 libssh2 security update
Ubuntu USN Ubuntu USN USN-5308-1 libssh2 vulnerabilities
References
Link Providers
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html cve-icon cve-icon
http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html cve-icon cve-icon
http://seclists.org/fulldisclosure/2019/Sep/42 cve-icon cve-icon
http://www.openwall.com/lists/oss-security/2019/03/18/3 cve-icon cve-icon
http://www.securityfocus.com/bid/107485 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:0679 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:1175 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:1652 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:1791 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:1943 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:2399 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/ cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2019-3855 cve-icon
https://seclists.org/bugtraq/2019/Apr/25 cve-icon cve-icon
https://seclists.org/bugtraq/2019/Mar/25 cve-icon cve-icon
https://seclists.org/bugtraq/2019/Sep/49 cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20190327-0005/ cve-icon cve-icon
https://support.apple.com/kb/HT210609 cve-icon cve-icon
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767 cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2019-3855 cve-icon
https://www.debian.org/security/2019/dsa-4431 cve-icon cve-icon
https://www.libssh2.org/CVE-2019-3855.html cve-icon cve-icon cve-icon
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html cve-icon cve-icon
History

Wed, 17 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.12496}

epss

{'score': 0.13214}


Subscriptions

Apple Xcode
Debian Debian Linux
Fedoraproject Fedora
Libssh2 Libssh2
Netapp Ontap Select Deploy Administration Utility
Opensuse Leap
Oracle Peoplesoft Enterprise Peopletools
Redhat Enterprise Linux Enterprise Linux Desktop Enterprise Linux Server Enterprise Linux Server Aus Enterprise Linux Server Eus Enterprise Linux Server Tus Enterprise Linux Workstation Rhel Aus Rhel E4s Rhel Eus Rhel Tus
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-12-17T21:40:11.249Z

Reserved: 2019-01-03T00:00:00.000Z

Link: CVE-2019-3855

cve-icon Vulnrichment

Updated: 2024-08-04T19:19:18.675Z

cve-icon NVD

Status : Modified

Published: 2019-03-21T21:29:00.433

Modified: 2024-11-21T04:42:43.427

Link: CVE-2019-3855

cve-icon Redhat

Severity : Important

Publid Date: 2019-03-13T00:00:00Z

Links: CVE-2019-3855 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses