critical
9.3
CWE
190 787
Advisory Published
CVE Published
Updated

CVE-2019-3855: Integer Overflow

First published: Mon Mar 11 2019(Updated: )

A malicious server could send a specially crafted packet which could result in an unchecked integer overflow. The value would then be used to allocate memory causing a possible memory write out of bounds error.

Credit: Chris Coulson secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
debian/libssh2<=1.8.0-2<=1.4.3-4.1+deb8u1<=1.4.3-1<=1.7.0-1
1.4.3-4.1+deb8u2
1.8.0-2.1
1.7.0-1+deb9u1
Apple Xcode<11.0
11.0
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
Fedoraproject Fedora=28
Fedoraproject Fedora=29
Fedoraproject Fedora=30
Debian Debian Linux=8.0
Debian Debian Linux=9.0
NetApp ONTAP Select Deploy administration utility
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
openSUSE Leap=42.3
Apple Xcode<11.0
Oracle PeopleSoft Enterprise PeopleTools=8.56
Oracle PeopleSoft Enterprise PeopleTools=8.57
redhat/libssh2<1.8.1
1.8.1
<1.8.1
=28
=29
=30
=8.0
=9.0
=8.0
=7.0
=7.0
=7.6
=7.6
=7.6
=7.0
=42.3
<11.0
=8.56
=8.57

Remedy

http://www.openwall.com/lists/oss-security/2019/03/18/3

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855

Remedy

https://www.libssh2.org/CVE-2019-3855.html

Remedy

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

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2019-3855?

    CVE-2019-3855 is an integer overflow flaw in libssh2 before version 1.8.1.

  • How severe is CVE-2019-3855?

    CVE-2019-3855 has a severity rating of 8.8, which is classified as critical.

  • What is the impact of CVE-2019-3855?

    CVE-2019-3855 could lead to an out-of-bounds write and allow a remote attacker to execute code when a user connects to a compromised SSH server.

  • Which software versions are affected by CVE-2019-3855?

    The affected software includes libssh2 versions before 1.8.1, Xcode before version 11.0, and various versions of Debian, Fedora, Redhat, and other products.

  • How can I fix CVE-2019-3855?

    To fix CVE-2019-3855, update libssh2 to version 1.8.1 or later, and ensure you are using the latest versions of other affected software.

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