CVE-2019-3862
libssh2: Out-of-bounds memory comparison with specially crafted message channel request
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_MSG_CHANNEL_REQUEST packets with an exit status message and no payload 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 · 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE-130 · Improper Handling of Length Parameter Inconsistency