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.
Fix
Patch, vendor advisory and mitigation references on NVD 8
- http://www.openwall.com/lists/oss-security/2019/03/18/3 Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855 Issue Tracking, Patch, Third Party Advisory
- https://www.libssh2.org/CVE-2019-3855.html Patch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/03/18/3 Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855 Issue Tracking, Patch, Third Party Advisory
- https://www.libssh2.org/CVE-2019-3855.html Patch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · libssh2, fedoraproject, debianNVD modified 2026-10-14 07:16
Affected (CPE criteria) 18
cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.56:*:*:*:*:*:*:*cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*
References 55
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html Third Party Advisory
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Sep/42 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/03/18/3 Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/107485 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0679 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1175 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1652 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1791 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1943 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2399 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855 Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
- https://seclists.org/bugtraq/2019/Apr/25 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Mar/25 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Sep/49 Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/ Third Party Advisory
- https://support.apple.com/kb/HT210609 Third Party Advisory
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767 Third Party Advisory
- https://www.debian.org/security/2019/dsa-4431 Third Party Advisory
- https://www.libssh2.org/CVE-2019-3855.html Patch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html Patch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html Third Party Advisory
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Sep/42 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/03/18/3 Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/107485 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0679 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1175 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1652 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1791 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1943 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2399 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855 Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
- https://seclists.org/bugtraq/2019/Apr/25 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Mar/25 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Sep/49 Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/ Third Party Advisory
- https://support.apple.com/kb/HT210609 Third Party Advisory
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767 Third Party Advisory
- https://www.debian.org/security/2019/dsa-4431 Third Party Advisory
- https://www.libssh2.org/CVE-2019-3855.html Patch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html