high
8.8
CWE
190 787
Advisory Published
CVE Published
Updated

CVE-2019-3857: Integer Overflow

First published: Mon Mar 11 2019(Updated: )

A server could send a SSH_MSG_CHANNEL_REQUEST packet with an exit signal message with a length of max unsigned integer value. The length would then have a value of 1 added to it and used to allocate memory causing a possible memory write out of bounds error or zero byte allocation.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
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
redhat/libssh2<1.8.1
1.8.1
libssh2>=1.2.8<=1.8.0
Debian=8.0
Debian=9.0
NetApp ONTAP Select Deploy
openSUSE=15.0
openSUSE=42.3
Red Hat 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
Fedora=28
Oracle PeopleSoft Enterprise PeopleTools=8.56
Oracle PeopleSoft Enterprise PeopleTools=8.57

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3857

Remedy

https://www.libssh2.org/CVE-2019-3857.html

Remedy

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

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-3857?

    CVE-2019-3857 is an integer overflow vulnerability discovered in libssh2 before 1.8.1.

  • What is the severity of CVE-2019-3857?

    CVE-2019-3857 has a severity level of 8.8 (high).

  • How does CVE-2019-3857 impact the affected software?

    CVE-2019-3857 could lead to an out of bounds write in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed, potentially allowing a remote attacker to execute code on the client system.

  • Which versions of libssh2 are affected by CVE-2019-3857?

    Versions of libssh2 before 1.8.1 are affected by CVE-2019-3857.

  • How can I fix CVE-2019-3857?

    To fix CVE-2019-3857, you should update libssh2 to version 1.8.1 or later.

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