Description
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.
References (12)
Core 12
Core References
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Mailing List, Release Notes mailing-list
http://www.openwall.com/lists/oss-security/2016/12/19/2
Third Party Advisory, VDB Entry vdb-entry
http://www.securitytracker.com/id/1037490
Vendor Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2017:2029
Mailing List mailing-list
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
Third Party Advisory, VDB Entry vdb-entry
http://www.securityfocus.com/bid/94975
Patch, Vendor Advisory
https://github.com/openbsd/src/commit/3095060f479b86288e31c79ecbc5131a66bcd2f9
Vendor Advisory
https://support.f5.com/csp/article/K62201745?utm_source=f5support&%3Butm_medium=RSS
Vendor Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us
Vendor Advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.647637
Various Sources
https://www.openssh.com/txt/release-7.4
Vendor Advisory
https://security.netapp.com/advisory/ntap-20171130-0002/
Scores
CVSS v3
7.8
EPSS
0.0002
EPSS Percentile
6.5%
Attack Vector
LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-119
Status
published
Products (1)
openbsd/openssh
< 7.3
Published
Jan 05, 2017
Tracked Since
Feb 18, 2026