CVE-2019-3857
HIGH severity · CVSS 8.8 · Integer overflow
8.8CVSS HIGH
Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)6%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlAdvisory
- https://access.redhat.com/errata/RHSA-2019:0679Advisory
- https://access.redhat.com/errata/RHSA-2019:1175Advisory
- https://access.redhat.com/errata/RHSA-2019:1652Advisory
- https://access.redhat.com/errata/RHSA-2019:1791Advisory
- https://access.redhat.com/errata/RHSA-2019:1943Advisory
- https://access.redhat.com/errata/RHSA-2019:2399Advisory