An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Fix
Patch, vendor advisory and mitigation references on NVD 10
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html Patch, Third Party Advisory, VDB Entry
- 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-2019-3859 Issue Tracking, Patch, Third Party Advisory
- https://seclists.org/bugtraq/2019/Mar/25 Mailing List, Patch, Third Party Advisory
- https://www.libssh2.org/CVE-2019-3859.html Vendor Advisory
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html Patch, Third Party Advisory, VDB Entry
- 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-2019-3859 Issue Tracking, Patch, Third Party Advisory
- https://seclists.org/bugtraq/2019/Mar/25 Mailing List, Patch, Third Party Advisory
- https://www.libssh2.org/CVE-2019-3859.html Vendor 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 9.1 · libssh2, fedoraproject, debianNVD modified 2026-10-14 07:16
Affected (CPE criteria) 8
cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*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:opensuse:leap:15.0:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
References 41
- 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 Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html Patch, Third Party Advisory, VDB Entry
- 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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859 Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00006.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/07/msg00024.html
- 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/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
- https://seclists.org/bugtraq/2019/Apr/25 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Mar/25 Mailing List, Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/ 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-2019-3859.html Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- 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 Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html Patch, Third Party Advisory, VDB Entry
- 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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859 Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00006.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/07/msg00024.html
- 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/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/
- https://seclists.org/bugtraq/2019/Apr/25 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Mar/25 Mailing List, Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/ 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-2019-3859.html Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html