CVE-2019-3855

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    CVE-2019-3855

    Published: 21 Mar 2019Last Modified: 7 Aug 2026

    Summary:

    Details: 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.

    References: 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/, http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html, http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html, http://seclists.org/fulldisclosure/2019/Sep/42, http://www.securityfocus.com/bid/107485, https://access.redhat.com/errata/RHSA-2019:0679, https://access.redhat.com/errata/RHSA-2019:1175, https://access.redhat.com/errata/RHSA-2019:1652, https://access.redhat.com/errata/RHSA-2019:1791, https://access.redhat.com/errata/RHSA-2019:1943, https://access.redhat.com/errata/RHSA-2019:2399, https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html, https://seclists.org/bugtraq/2019/Apr/25, https://seclists.org/bugtraq/2019/Mar/25, https://seclists.org/bugtraq/2019/Sep/49, https://security.netapp.com/advisory/ntap-20190327-0005/, https://support.apple.com/kb/HT210609, https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767, https://www.debian.org/security/2019/dsa-4431, http://www.openwall.com/lists/oss-security/2019/03/18/3, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855, https://www.libssh2.org/CVE-2019-3855.html, https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -f15b1e297f72882214988101ccdc5e6ad30d7e6e

    Affected versions

    libssh2-1.8.0

    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