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Fencer Intel
medium 6.2

CVE-2016-10011 json

authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local user…

published 2017-01-05 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-1208

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.

Patch / fix

  • openssh Debian 14, Debian 13, Debian 12 1:7.4p1-1

debian advisories DEBIAN-CVE-2016-10011

  • openssh Ubuntu 14.04 LTS 1:6.6p1-2ubuntu2.10
  • openssh Ubuntu 16.04 LTS 1:7.2p2-4ubuntu2.4

ubuntu advisories UBUNTU-CVE-2016-10011

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssh RHEL 7 7.4p1-11.el7
  • openssh-cavs RHEL 7 7.4p1-11.el7
  • openssh-ldap RHEL 7 7.4p1-11.el7
  • openssh-keycat RHEL 7 7.4p1-11.el7
  • openssh-server RHEL 7 7.4p1-11.el7
  • openssh-askpass RHEL 7 7.4p1-11.el7
  • openssh-clients RHEL 7 7.4p1-11.el7
  • pam_ssh_agent_auth RHEL 7 0.10.3-1.11.el7

red hat advisories RHSA-2017:2029

  • openssh-openssl1 SLES 11-SECURITY 6.6p1-18.1
  • openssh SLES 12 SP1, SLED 12 SP1, SLES for SAP 12 SP1 +2 more 6.6p1-54.7.1
  • openssh-askpass-gnome SLES 12 SP1, SLED 12 SP1, SLES for SAP 12 SP1 +2 more 6.6p1-54.7.1
  • openssh SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 +3 more 6.2p2-0.40.1
  • openssh-askpass-gnome SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 +3 more 6.2p2-0.40.3
  • openssh SLES for SAP 11 SP4, SLES 11 SP4 6.6p1-35.1
  • openssh-askpass-gnome SLES for SAP 11 SP4, SLES 11 SP4 6.6p1-35.4
  • openssh SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 7.2p2-66.1

suse advisories SUSE-SU-2017:1661-1SUSE-SU-2017:0607-1SUSE-SU-2017:0607-2SUSE-SU-2017:0607-3SUSE-SU-2017:0606-1SUSE-SU-2017:0603-1

  • openssh openSUSE Tumbleweed 8.4p1-7.4

opensuse advisories openSUSE-SU-2024:11124-1

  • openssh Alpine 3.24, Alpine 3.23, Alpine 3.22 +16 more 7.4_p1-r0
  • openssh Alpine 3.2 6.8_p1-r9
  • openssh Alpine 3.3 7.2_p2-r3
  • openssh Alpine 3.4 7.2_p2-r4
  • openssh Alpine 3.7 7.5_p1-r8

alpine advisories ALPINE-CVE-2016-10011

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssh Arch Linux 7.4p1-1

arch linux advisories AVG-110

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-10011 updated cvss 2.5

openssh: Leak of host private key material to privilege-separated child process via realloc()

  • Red Hat Enterprise Linux 4 openssh Red Hat Enterprise Linux 5 openssh
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 6 openssh, openssh-ldap, openssh-server, openssh-askpass, openssh-clients, pam_ssh_agent_auth
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux Client (v. 7) openssh 7.4p1-11.el7, openssh-keycat 7.4p1-11.el7, openssh-server 7.4p1-11.el7, openssh-askpass 7.4p1-11.el7, openssh-clients 7.4p1-11.el7 Red Hat Enterprise Linux Client Optional (v. 7) openssh-cavs 7.4p1-11.el7, openssh-ldap 7.4p1-11.el7, pam_ssh_agent_auth 0.10.3-1.11.el7, openssh-server-sysvinit 7.4p1-11.el7 Red Hat Enterprise Linux ComputeNode (v. 7) openssh 7.4p1-11.el7, openssh-keycat 7.4p1-11.el7, openssh-server 7.4p1-11.el7, openssh-clients 7.4p1-11.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssh-cavs 7.4p1-11.el7, openssh-ldap 7.4p1-11.el7, openssh-askpass 7.4p1-11.el7, pam_ssh_agent_auth 0.10.3-1.11.el7, openssh-server-sysvinit 7.4p1-11.el7 Red Hat Enterprise Linux Server (v. 7) openssh 7.4p1-11.el7, openssh-keycat 7.4p1-11.el7, openssh-server 7.4p1-11.el7, openssh-askpass 7.4p1-11.el7, openssh-clients 7.4p1-11.el7 Red Hat Enterprise Linux Server Optional (v. 7) openssh-cavs 7.4p1-11.el7, openssh-ldap 7.4p1-11.el7, pam_ssh_agent_auth 0.10.3-1.11.el7, openssh-server-sysvinit 7.4p1-11.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) openssh 7.4p1-11.el7, openssh-keycat 7.4p1-11.el7, openssh-server 7.4p1-11.el7, openssh-askpass 7.4p1-11.el7, openssh-clients 7.4p1-11.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) openssh-cavs 7.4p1-11.el7, openssh-ldap 7.4p1-11.el7, pam_ssh_agent_auth 0.10.3-1.11.el7, openssh-server-sysvinit 7.4p1-11.el7
    fixed: vendor fix RHSA-2017:2029

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-22-349-21 updated cvss 5.5

Siemens SCALANCE X-200RNA Switch Devices

  • Siemens SCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2) <V3.2.7 Siemens SCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2) <V3.2.7 Siemens SCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3) <V3.2.7 Siemens SCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3) <V3.2.7 Siemens SCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3) <V3.2.7
    affected: fixed in V3.2.7, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-320 Key Management Errors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.