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Public proof of conceptFix available

CVE-2016-10708

A public proof of concept exists; no exploitation attested.

  • Published2018-01-21
  • WeaknessCWE-476

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2018-01-2122:29CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub
  3. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Versions per branch

NVD
Canonical ubuntu linux
BranchAffectedFixed in
14.4= 14.04no fix published
16.4= 16.04no fix published
18.4= 18.04no fix published
Debian debian linux
BranchAffectedFixed in
7.0= 7.0no fix published
8.0= 8.0no fix published
Netapp cloud backup
BranchAffectedFixed in
—all versionsno fix published

9 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • opensshUbuntu:18.04:LTSall versions · fixed in 1:7.6p1-4ubuntu0.1
  • opensshUbuntu:16.04:LTSall versions · fixed in 1:7.2p2-4ubuntu2.6
  • opensshUbuntu:14.04:LTSall versions · fixed in 1:6.6p1-2ubuntu2.11
  • opensshTuxCare:OracleLinux:6all versions · fixed in 5.3p1-125.el6.tuxcare.els2and 4 other packages
  • opensshTuxCare:CentOS:6all versions · fixed in 5.3p1-125.el6.tuxcare.els2and 4 other packages
  • opensshSUSE:OpenStack Cloud 7all versions · fixed in 7.2p2-74.25.1and 1 other package
  • opensshSUSE:Linux Enterprise Server for SAP Applications 12 SP3all versions · fixed in 7.2p2-74.19.1and 1 other package
  • opensshSUSE:Linux Enterprise Server for SAP Applications 12 SP2all versions · fixed in 7.2p2-74.25.1and 1 other package

32 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2017:2029 Red Hat Product Security104 products fixed

    Red Hat Security Advisory: openssh security, bug fix, and enhancement update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2017:2029 · 104 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the OpenSSH server daemon (sshd) will be restarted automatically.

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2018-01-21
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-fq52-jg4q-73hp

Frequently asked questions

What is 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.

Is CVE-2016-10708 actively exploited?

Active exploitation of CVE-2016-10708 has not been confirmed. Its EPSS score was 15.7% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-10708?

CVE-2016-10708 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record