CVE-2016-10012
Published: 4 January 2017
The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check is enforced by all compilers, which might allows local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures.
Notes
Author | Note |
---|---|
ratliff | Mitigating circumstances noted in the release notes: This could potentially allow attacks against the privileged monitor process from the sandboxed privilege-separation process (a compromise of the latter would be required first). also "pre-auth compression has been disabled by default in sshd for >10 years." |
Priority
Status
Package | Release | Status |
---|---|---|
openssh Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(1:7.4p1-1)
|
bionic |
Not vulnerable
(1:7.4p1-1)
|
|
cosmic |
Not vulnerable
(1:7.4p1-1)
|
|
disco |
Not vulnerable
(1:7.4p1-1)
|
|
eoan |
Not vulnerable
(1:7.4p1-1)
|
|
focal |
Not vulnerable
(1:7.4p1-1)
|
|
groovy |
Not vulnerable
(1:7.4p1-1)
|
|
hirsute |
Not vulnerable
(1:7.4p1-1)
|
|
precise |
Ignored
(reached end-of-life)
|
|
trusty |
Released
(1:6.6p1-2ubuntu2.10)
|
|
upstream |
Released
(1:7.4p1-1)
|
|
xenial |
Released
(1:7.2p2-4ubuntu2.4)
|
|
yakkety |
Ignored
(reached end-of-life)
|
|
zesty |
Not vulnerable
(1:7.4p1-1)
|
|
Patches: upstream: https://github.com/openssh/openssh-portable/commit/0082fba4efdd492f765ed4c53f0d0fbd3bdbdf7f upstream: https://github.com/openssh/openssh-portable/commit/4577adead6a7d600c8e764619d99477a08192c8f upstream: https://github.com/openssh/openssh-portable/commit/b7689155f3f5c4999846c07a852b1c7a43b09cec |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.8 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |