CVE-2019-3863

Name: CVE-2019-3863
Creator: NVD / NIST
Published: 2019-03-25T18:29:01.59+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.44%

Last modified Jun 17, 2026

CVE-2019-3863 is a vulnerability of currently unknown severity. A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. EPSS estimates a 3.44% chance of exploitation in the next 30 days.

Description

A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.

Metrics

EPSS Probability

3.44%

87.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libssh2	Libssh2	< 1.8.1
Debian	Debian Linux	8.0
Netapp	Ontap Select Deploy Administration Utility	All versions
Opensuse	Leap	15.0
Opensuse	Leap	42.3
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

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:0679Third Party Advisory
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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3863Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
https://seclists.org/bugtraq/2019/Apr/25
https://security.netapp.com/advisory/ntap-20190327-0005/Third Party Advisory
https://www.debian.org/security/2019/dsa-4431
https://www.libssh2.org/CVE-2019-3863.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:0679Third Party Advisory
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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3863Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/
https://seclists.org/bugtraq/2019/Apr/25
https://security.netapp.com/advisory/ntap-20190327-0005/Third Party Advisory
https://www.debian.org/security/2019/dsa-4431
https://www.libssh2.org/CVE-2019-3863.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Timeline

Published: Mar 25, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-3863?

How severe is CVE-2019-3863?

Severity scoring for CVE-2019-3863 is pending analysis. The EPSS model estimates a 3.44% probability of exploitation in the next 30 days.

How do I fix CVE-2019-3863?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-3863?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST