High severity · published Mar 25, 2019
CVE-2019-3863
A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side
8.8
CVSS
3.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.4% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libssh2 · The libssh2 Project
1.8.1 · source: vendor, NVD
DL
Debian Linux · Debian
8.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Server Eus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Workstation · Redhat
7.0 · source: NVD
LE
Leap · Opensuse
15.0; 42.3 · source: NVD
OS
Ontap Select Deploy Administration Utility · Netapp
All versions, or not specified · source: NVD
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-3863
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-3863
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
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:1175
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:1652
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:1791
More from libssh2
9.1
CVE-2019-3860
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed
9.1
CVE-2019-3861
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH packets with a padding length value greater than the packet length are parsed
9.1
CVE-2019-3858
An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server
9.1
CVE-2019-3862
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed
9.1
CVE-2019-3859
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions