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    CVE-2019-3859

    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.

    Published:Mar 13, 2019
    Last Modified:Dec 18, 2025
    EPS:Mar 20, 2019
    EPSS Score:0.00899
    CVSS Score:9.1

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Libssh2
    Product
    Libssh2
    Vendor
    Netapp
    Product
    Ontap Select Deploy Administration Utility
    Vendor
    Opensuse
    Product
    Leap

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html
    http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html
    http://www.openwall.com/lists/oss-security/2019/03/18/3
    http://www.securityfocus.com/bid/107485
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859
    https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
    https://lists.debian.org/debian-lts-announce/2019/04/msg00006.html
    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
    https://seclists.org/bugtraq/2019/Mar/25
    https://security.netapp.com/advisory/ntap-20190327-0005/
    https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767
    https://www.debian.org/security/2019/dsa-4431
    https://www.libssh2.org/CVE-2019-3859.html
    https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
    http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html
    http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html
    http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html
    http://www.openwall.com/lists/oss-security/2019/03/18/3
    http://www.securityfocus.com/bid/107485
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859
    https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
    https://lists.debian.org/debian-lts-announce/2019/04/msg00006.html
    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
    https://seclists.org/bugtraq/2019/Mar/25
    https://security.netapp.com/advisory/ntap-20190327-0005/
    https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767
    https://www.debian.org/security/2019/dsa-4431
    https://www.libssh2.org/CVE-2019-3859.html
    https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High