CVE-2016-10012
Published: 04 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.
Priority
Low
CVSS 3 base score: 7.8
Status
| Package | Release | Status |
|---|---|---|
|
openssh Launchpad, Ubuntu, Debian |
Upstream |
Released
(1:7.4p1-1)
|
| Ubuntu 21.04 (Hirsute Hippo) |
Not vulnerable
(1:7.4p1-1)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(1:7.4p1-1)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(1:7.4p1-1)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(1:7.2p2-4ubuntu2.4)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(1:6.6p1-2ubuntu2.10)
|
|
|
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 |
||
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." |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-10012
- https://www.openssh.com/txt/release-7.4
- http://www.openwall.com/lists/oss-security/2016/12/19/2
- https://ubuntu.com/security/notices/USN-3538-1
- NVD
- Launchpad
- Debian