Critical severity · published Mar 21, 2019
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
CVSS
6.4%
EPSS
No
On KEV
Description
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. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)6.4% · higher than 94% 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
FE
Fedora · Fedoraproject
29 · 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
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-3858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-3858
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
http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html
Mailing List
http://www.openwall.com/lists/oss-security/2019/03/18/3
Third Party Advisory
http://www.securityfocus.com/bid/107485
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:2136
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-2019-3862
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
8.8
CVE-2019-3856
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed