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 |