CVE-2016-10708

sshd in OpenSSH before 7.4 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an out-of-sequence NEWKEYS message, as demonstrated by Honggfuzz, related to kex.c and packet.c.

Published: 2018-01-21 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-10708 is rated Moderate Risk (60.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.12%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-10708

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-30 2.92% 3.12% +0.20%
2 2026-03-25 3.12% 2.92% -0.20%
3 2026-03-19 — 3.12% —

Full EPSS history (53 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-10708

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-10708

GitHub Security Advisory for CVE-2016-10708

GHSA-fq52-jg4q-73hp · Severity: high — sshd in OpenSSH before 7.4 allows remote attackers to cause a denial of service (NULL pointer...

OS Trackers for CVE-2016-10708

vendor priority summary link
debian not yet assigned CVE-2016-10708 not yet assigned priority: Debian including 1 source packages (openssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-10708
redhat low — https://access.redhat.com/security/cve/CVE-2016-10708
suse medium CVE-2016-10708 severity moderate: SUSE including 30 source package names (openssh-6.2p2-0.41.5.1, openssh-6.6p1-36.3.1, …), 92 product×package rows across 26 product lines (SUSE Enterprise Storage 4, SUSE Linux Enterprise Desktop 12 SP3, … (26 product lines)): Fixed 92. https://www.suse.com/security/cve/CVE-2016-10708/
ubuntu low CVE-2016-10708 low priority: Ubuntu including 1 source packages (openssh), 11 status rows across 11 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, trusty, upstream, xenial): not-affected 8, released 3. https://ubuntu.com/security/CVE-2016-10708

Affected software / configurations for CVE-2016-10708

Vendor Product Version Raw CPE
openbsd openssh < 7.4 cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:*:*:*:*
netapp cloud_backup — cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
netapp data_ontap — cpe:2.3:a:netapp:data_ontap:-:*:*:*:*:7-mode:*:*
netapp data_ontap_edge — cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*
netapp oncommand_unified_manager >= 9.4 cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:*
netapp service_processor — cpe:2.3:a:netapp:service_processor:-:*:*:*:*:*:*:*
netapp storagegrid — cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*
netapp storagegrid_webscale — cpe:2.3:a:netapp:storagegrid_webscale:-:*:*:*:*:*:*:*
netapp clustered_data_ontap — cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
netapp vasa_provider — cpe:2.3:a:netapp:vasa_provider:-:*:*:*:*:*:*:*

References for CVE-2016-10708

URL Tags
http://blog.swiecki.net/2018/01/fuzzing-tcp-servers.html Patch Third Party Advisory
http://www.securityfocus.com/bid/102780 Third Party Advisory VDB Entry
https://anongit.mindrot.org/openssh.git/commit/?id=28652bca29046f62c7045e933e6b931de1d16737 Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf
https://kc.mcafee.com/corporate/index?page=content&id=SB10284
https://lists.debian.org/debian-lts-announce/2018/01/msg00031.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20180423-0003/ Third Party Advisory
https://support.f5.com/csp/article/K32485746?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/3809-1/ Third Party Advisory
https://www.openssh.com/releasenotes.html Release Notes Vendor Advisory
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