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Fencer Intel
medium 4.3

CVE-2015-5352 json

The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refu…

published 2015-08-03 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-5308

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refusal deadline for X connections, which makes it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window.

Patch / fix

  • openssh Debian 14, Debian 13, Debian 12 1:6.9p1-1

debian advisories DEBIAN-CVE-2015-5352

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

ubuntu advisories UBUNTU-CVE-2015-5352

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 6 5.3p1-117.el6
  • openssh-ldap RHEL 6 5.3p1-117.el6
  • openssh-server RHEL 6 5.3p1-117.el6
  • openssh-askpass RHEL 6 5.3p1-117.el6
  • openssh-clients RHEL 6 5.3p1-117.el6
  • pam_ssh_agent_auth RHEL 6 0.9.3-117.el6

red hat advisories RHSA-2016:0741

  • openssh SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 6.6p1-13.1
  • openssh-askpass-gnome SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 6.6p1-13.3
  • openssh SLES for SAP 11 SP3, SLES 11 SP3-TERADATA, SLES 11 SP3 +1 more 6.2p2-0.21.1
  • openssh-askpass-gnome SLES for SAP 11 SP3, SLES 11 SP3-TERADATA, SLES 11 SP3 +1 more 6.2p2-0.21.3
  • openssh SLES for SAP 12, SLES 12, SLED 12 6.6p1-29.1
  • openssh-askpass-gnome SLES for SAP 12, SLES 12, SLED 12 6.6p1-29.1
  • openssh SLES 11 SP2-LTSS 5.1p1-41.69.1
  • openssh-askpass-gnome SLES 11 SP2-LTSS 5.1p1-41.69.4

suse advisories SUSE-SU-2015:1840-1SUSE-SU-2015:1695-1SUSE-SU-2015:1581-1SUSE-SU-2015:1544-1

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-2015-5352 updated cvss 4.9

openssh: XSECURITY restrictions bypass under certain conditions in ssh(1)

  • Red Hat Enterprise Linux 5 openssh
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Desktop (v. 6) openssh 5.3p1-117.el6, openssh-server 5.3p1-117.el6, openssh-askpass 5.3p1-117.el6, openssh-clients 5.3p1-117.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) openssh-ldap 5.3p1-117.el6, pam_ssh_agent_auth 0.9.3-117.el6 Red Hat Enterprise Linux HPC Node (v. 6) openssh 5.3p1-117.el6, openssh-server 5.3p1-117.el6, openssh-clients 5.3p1-117.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssh-ldap 5.3p1-117.el6, openssh-askpass 5.3p1-117.el6, pam_ssh_agent_auth 0.9.3-117.el6 Red Hat Enterprise Linux Server (v. 6) openssh 5.3p1-117.el6, openssh-server 5.3p1-117.el6, openssh-askpass 5.3p1-117.el6, openssh-clients 5.3p1-117.el6 Red Hat Enterprise Linux Server Optional (v. 6) openssh-ldap 5.3p1-117.el6, pam_ssh_agent_auth 0.9.3-117.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) openssh 5.3p1-117.el6, openssh-server 5.3p1-117.el6, openssh-askpass 5.3p1-117.el6, openssh-clients 5.3p1-117.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) openssh-ldap 5.3p1-117.el6, pam_ssh_agent_auth 0.9.3-117.el6
    fixed: vendor fix RHSA-2016:0741
  • Red Hat Enterprise Linux 7 openssh, openssh-cavs, openssh-ldap, openssh-keycat, openssh-server, openssh-askpass, +3 more
    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 5.3

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

Exploit prediction

4.52% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

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.