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Fencer Intel
high 8.1

CVE-2016-0778 in the critical feed json

The (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when cert…

published 2016-01-14 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-0793

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
20.9%
EPSS 20.9% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

The (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when certain proxy and forward options are enabled, do not properly maintain connection file descriptors, which allows remote servers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact by requesting many forwardings.

Patch / fix

  • openssh Debian 14, Debian 13, Debian 12 1:7.1p2-1

debian advisories DEBIAN-CVE-2016-0778

  • openssh Ubuntu 14.04 LTS 1:6.6p1-2ubuntu2.4

ubuntu advisories UBUNTU-CVE-2016-0778

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 6.6.1p1-23.el7_2
  • openssh-ldap RHEL 7 6.6.1p1-23.el7_2
  • openssh-keycat RHEL 7 6.6.1p1-23.el7_2
  • openssh-server RHEL 7 6.6.1p1-23.el7_2
  • openssh-askpass RHEL 7 6.6.1p1-23.el7_2
  • openssh-clients RHEL 7 6.6.1p1-23.el7_2
  • pam_ssh_agent_auth RHEL 7 0.9.3-9.23.el7_2
  • openssh-server-sysvinit RHEL 7 6.6.1p1-23.el7_2

red hat advisories RHSA-2016:0043

  • openssh-openssl1 SLES 11-SECURITY 6.6p1-10.1
  • openssh SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +3 more 6.6p1-33.1
  • openssh-askpass-gnome SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +3 more 6.6p1-33.1
  • openssh SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 6.6p1-16.1
  • openssh-askpass-gnome SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 6.6p1-16.4
  • openssh SLES for SAP 11 SP3, SLES 11 SP3-TERADATA, SLES 11 SP3 +1 more 6.2p2-0.24.1
  • openssh-askpass-gnome SLES for SAP 11 SP3, SLES 11 SP3-TERADATA, SLES 11 SP3 +1 more 6.2p2-0.24.3

suse advisories SUSE-SU-2016:0117-1SUSE-SU-2016:0118-1SUSE-SU-2016:0120-1SUSE-SU-2016:0119-1

  • openssh openSUSE Tumbleweed 7.2p2-3.1

opensuse advisories openSUSE-SU-2024:10174-1

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-2016-0778 updated cvss 5.1

OpenSSH: Client buffer-overflow when using roaming connections

  • Red Hat Enterprise Linux Client (v. 7) openssh 6.6.1p1-23.el7_2, openssh-keycat 6.6.1p1-23.el7_2, openssh-server 6.6.1p1-23.el7_2, openssh-askpass 6.6.1p1-23.el7_2, openssh-clients 6.6.1p1-23.el7_2 Red Hat Enterprise Linux Client Optional (v. 7) openssh-ldap 6.6.1p1-23.el7_2, pam_ssh_agent_auth 0.9.3-9.23.el7_2, openssh-server-sysvinit 6.6.1p1-23.el7_2 Red Hat Enterprise Linux ComputeNode (v. 7) openssh 6.6.1p1-23.el7_2, openssh-keycat 6.6.1p1-23.el7_2, openssh-server 6.6.1p1-23.el7_2, openssh-clients 6.6.1p1-23.el7_2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssh-ldap 6.6.1p1-23.el7_2, openssh-askpass 6.6.1p1-23.el7_2, pam_ssh_agent_auth 0.9.3-9.23.el7_2, openssh-server-sysvinit 6.6.1p1-23.el7_2 Red Hat Enterprise Linux Server (v. 7) openssh 6.6.1p1-23.el7_2, openssh-keycat 6.6.1p1-23.el7_2, openssh-server 6.6.1p1-23.el7_2, openssh-askpass 6.6.1p1-23.el7_2, openssh-clients 6.6.1p1-23.el7_2 Red Hat Enterprise Linux Server Optional (v. 7) openssh-ldap 6.6.1p1-23.el7_2, pam_ssh_agent_auth 0.9.3-9.23.el7_2, openssh-server-sysvinit 6.6.1p1-23.el7_2
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) openssh 6.6.1p1-23.el7_2, openssh-keycat 6.6.1p1-23.el7_2, openssh-server 6.6.1p1-23.el7_2, openssh-askpass 6.6.1p1-23.el7_2, openssh-clients 6.6.1p1-23.el7_2 Red Hat Enterprise Linux Workstation Optional (v. 7) openssh-ldap 6.6.1p1-23.el7_2, pam_ssh_agent_auth 0.9.3-9.23.el7_2, openssh-server-sysvinit 6.6.1p1-23.el7_2
    fixed: vendor fix RHSA-2016:0043
  • Red Hat Enterprise Linux 4 openssh Red Hat Enterprise Linux 5 openssh Red Hat Enterprise Linux 6 openssh, openssh-ldap, openssh-server, openssh-askpass, openssh-clients, pam_ssh_agent_auth
    not affected: vulnerable code not present

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 8.1

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
total
Assessed
5 mo ago

Exploit prediction

20.90% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2016/01/14/7 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:N/AC:H/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.