CVE-2019-3863

moderate-risk
Published 2019-03-25

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.

Do I need to act?

~
8.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / HIGH complexity

Affected Products (11)

Affected Vendors

Debian Redhat Netapp Opensuse Libssh2

References (32)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
Third Party Advisory 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
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3863
Mailing List https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
https://seclists.org/bugtraq/2019/Apr/25
Third Party Advisory https://security.netapp.com/advisory/ntap-20190327-0005/
https://www.debian.org/security/2019/dsa-4431
Patch https://www.libssh2.org/CVE-2019-3863.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0679
https://access.redhat.com/errata/RHSA-2019:1175
and 12 more references
48
/ 100
moderate-risk
Severity 22/34 · High
Exploitability 10/34 · Low
Exposure 16/34 · Moderate