CVE-2019-3861

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Summary

CVECVE-2019-3861
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-03-25 19:29:01 UTC
Updated2026-10-14 07:16:52 UTC
DescriptionAn out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Risk And Classification

Primary CVSS: v3.0 9.1 CRITICAL from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-125 | CWE-125 CWE-125

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary9.1CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.0[email protected]Secondary5MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
3.0CNADECLARED5MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
2.0[email protected]Primary6.4AV:N/AC:L/Au:N/C:P/I:N/A:P

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 8.0 All All All
Application Libssh2 Libssh2 All All All All
Application Netapp Ontap Select Deploy Administration Utility - All All All
Operating System Opensuse Leap 15.0 All All All
Operating System Opensuse Leap 42.3 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA The Libssh2 Project Libssh2 affected 1.8.1 Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] Fedora 28 Update: libssh2-1.8.1-1.fc28 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[security-announce] openSUSE-SU-2019:1075-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Bugtraq: [SECURITY] [DSA 4431-1] libssh2 security update af854a3a-2127-422b-91ae-364da2661108 seclists.org
[security-announce] openSUSE-SU-2019:1109-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
Oracle Critical Patch Update - October 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
[SECURITY] [DLA 1730-1] libssh2 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
Debian -- Security Information -- DSA-4431-1 libssh2 af854a3a-2127-422b-91ae-364da2661108 www.debian.org
libssh2 Security Advisory: CVE-2019-3861 af854a3a-2127-422b-91ae-364da2661108 www.libssh2.org Patch, Vendor Advisory
1687311 – (CVE-2019-3861) CVE-2019-3861 libssh2: Out-of-bounds reads with specially crafted SSH packets af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
March 2019 Libssh2 Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] Fedora 28 Update: libssh2-1.8.1-1.fc28 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 377521 Alibaba Cloud Linux Security Update for libssh2 (ALINUX2-SA-2019:0100)
  • 500318 Alpine Linux Security Update for libssh2
  • 504085 Alpine Linux Security Update for libssh2
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 750528 OpenSUSE Security Update for libssh2_org (openSUSE-SU-2020:2129-1)
  • 750530 OpenSUSE Security Update for libssh2_org (openSUSE-SU-2020:2126-1)

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