CVE-2016-8858
Published: 9 December 2016
** DISPUTED ** The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."
Notes
Author | Note |
---|---|
mdeslaur | DoS is limited to attacker's connection only, and openssh upstream does not consider this to be a security issue We do not consider this to be a security issue either, marking as ignored |
Priority
Status
Package | Release | Status |
---|---|---|
openssh Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(1:7.3p1-2)
|
precise |
Ignored
(end of life)
|
|
trusty |
Ignored
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Not vulnerable
(1:7.3p1-2)
|
|
Patches: upstream: https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |