PT-2018-1896
CVE-2016-10708
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Published
2017-08-01
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Updated
2025-10-29
Description by
CVSS 3.1
7.5
HighMetricsAV: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.
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