CVE-2019-3861
libssh2: Out-of-bounds reads with specially crafted SSH packets
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · March 13, 2019
Updated · October 14, 2026
Description
An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.
Statement
This flaw was present in libssh2 packages included in Red Hat Virtualization Hypervisor and Management Appliance, however libssh2 in these hosts is never exposed to malicious clients or servers.
libssh2 is no longer included in the virt module since Red Hat Enterprise Linux 8.1.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 5CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CWE-125 · Out-of-bounds Read