high
8.8
CWE
190 787
Advisory Published
CVE Published
Updated

CVE-2019-3856: Integer Overflow

First published: Mon Mar 11 2019(Updated: )

A server could send a value approching unsinged int max number of keyboard prompt requests which could result in an unchecked interger overflow. The value would then be used to allocate memory causing a possible memory write out of bounds error.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/libssh2<1.8.1
1.8.1
debian/libssh2
1.8.0-2.1
1.8.0-2.1+deb10u1
1.9.0-2
1.10.0-3
1.11.0-2
Libssh2 Libssh2<1.8.1
Debian Debian Linux=8.0
Debian Debian Linux=9.0
NetApp ONTAP Select Deploy administration utility
openSUSE Leap=15.0
openSUSE Leap=42.3
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=7.0
Fedoraproject Fedora=28
Oracle PeopleSoft Enterprise PeopleTools=8.56
Oracle PeopleSoft Enterprise PeopleTools=8.57

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3856

Remedy

https://www.libssh2.org/CVE-2019-3856.html

Remedy

https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID of this security flaw?

    The vulnerability ID of this security flaw is CVE-2019-3856.

  • What is the severity level of CVE-2019-3856?

    CVE-2019-3856 has a severity level of 8.8, which is considered high.

  • Which software versions are affected by CVE-2019-3856?

    CVE-2019-3856 affects libssh2 versions before 1.8.1.

  • How can an attacker exploit CVE-2019-3856?

    An attacker who compromises an SSH server can exploit CVE-2019-3856 to execute code on the client system when a user connects to the server.

  • Is there a fix available for CVE-2019-3856?

    Yes, a fix is available for CVE-2019-3856 in libssh2 version 1.8.1.

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