PT-2018-1896 · Openssh+5 · Openssh+5

CVE-2016-10708

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Published

2017-08-01

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Updated

2025-10-29

CVSS v3.1

7.5

High

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions OpenSSH versions prior to 7.4
Description The issue is related to a denial of service caused by a NULL pointer dereference and daemon crash in OpenSSH. This can be triggered by remote attackers via an out-of-sequence NEWKEYS message, as demonstrated by Honggfuzz, and is related to the kex.c and packet.c files. The error occurs when handling an out-of-sequence NEWKEYS message, allowing a remote attacker to cause a denial of service.
Recommendations For OpenSSH versions prior to 7.4, update to version 7.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the sshd server to minimize the risk of exploitation.

Exploit

Fix

DoS

NULL Pointer Dereference

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Weakness Enumeration

Related Identifiers

ALT-PU-2018-2598
ALT-PU-2024-3921
ALT-PU-2024-4077
ALT-PU-2024-4467
ALT-PU-2024-9513
BDU:2018-01500
CESA-2017_2029
CVE-2016-10708
DLA-1257-1
DLA-1500-1
OPENSUSE-SU-2018_2128-1
RHSA-2017:2029
RHSA-2017_2029
SUSE-SU-2018:1989-1
SUSE-SU-2018:2275-1
SUSE-SU-2018:2530-1
SUSE-SU-2018:2530-2
SUSE-SU-2018:2685-1
SUSE-SU-2018:2719-1
SUSE-SU-2018:3540-1
SUSE-SU-2018_1989-1
SUSE-SU-2018_2530-1
SUSE-SU-2018_2530-2
USN-3809-1
USN-3809-2

Affected Products

Alt Linux
Centos
Openssh
Red Hat
Suse
Ubuntu