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Fencer Intel
medium 6.5

CVE-2014-2653 json

The verify_host_key function in sshconnect.c in the client in OpenSSH 6.6 and earlier allows remote servers to trigger the skipping of SSHF…

published 12y ago modified 4mo ago also EUVD-2014-2685

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

The verify_host_key function in sshconnect.c in the client in OpenSSH 6.6 and earlier allows remote servers to trigger the skipping of SSHFP DNS RR checking by presenting an unacceptable HostCertificate.

Patch / fix

  • openssh Debian 14, Debian 13, Debian 12 1:6.6p1-1

debian advisories DEBIAN-CVE-2014-2653

  • openssh RHEL 7 6.6.1p1-11.el7
  • openssh-ldap RHEL 7 6.6.1p1-11.el7
  • openssh-keycat RHEL 7 6.6.1p1-11.el7
  • openssh-server RHEL 7 6.6.1p1-11.el7
  • openssh-askpass RHEL 7 6.6.1p1-11.el7
  • openssh-clients RHEL 7 6.6.1p1-11.el7
  • pam_ssh_agent_auth RHEL 7 0.9.3-9.11.el7
  • openssh-server-sysvinit RHEL 7 6.6.1p1-11.el7

red hat advisories RHSA-2015:0425RHSA-2014:1552

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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-2014-2653 updated cvss 4.3

openssh: failure to check DNS SSHFP records in certain scenarios

  • Red Hat Enterprise Linux 5 openssh
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) openssh 6.6.1p1-11.el7, openssh-keycat 6.6.1p1-11.el7, openssh-server 6.6.1p1-11.el7, openssh-askpass 6.6.1p1-11.el7, openssh-clients 6.6.1p1-11.el7 Red Hat Enterprise Linux Client Optional (v. 7) openssh-ldap 6.6.1p1-11.el7, pam_ssh_agent_auth 0.9.3-9.11.el7, openssh-server-sysvinit 6.6.1p1-11.el7 Red Hat Enterprise Linux ComputeNode (v. 7) openssh 6.6.1p1-11.el7, openssh-keycat 6.6.1p1-11.el7, openssh-server 6.6.1p1-11.el7, openssh-clients 6.6.1p1-11.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssh-ldap 6.6.1p1-11.el7, openssh-askpass 6.6.1p1-11.el7, pam_ssh_agent_auth 0.9.3-9.11.el7, openssh-server-sysvinit 6.6.1p1-11.el7
    fixed: vendor fix RHSA-2015:0425
  • Red Hat Enterprise Linux Desktop (v. 6) openssh 5.3p1-104.el6, openssh-server 5.3p1-104.el6, openssh-askpass 5.3p1-104.el6, openssh-clients 5.3p1-104.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) openssh-ldap 5.3p1-104.el6, pam_ssh_agent_auth 0.9.3-104.el6 Red Hat Enterprise Linux HPC Node (v. 6) openssh 5.3p1-104.el6, openssh-server 5.3p1-104.el6, openssh-clients 5.3p1-104.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssh-ldap 5.3p1-104.el6, openssh-askpass 5.3p1-104.el6, pam_ssh_agent_auth 0.9.3-104.el6 Red Hat Enterprise Linux Server (v. 6) openssh 5.3p1-104.el6, openssh-server 5.3p1-104.el6, openssh-askpass 5.3p1-104.el6, openssh-clients 5.3p1-104.el6
    fixed: vendor fix RHSA-2014:1552
  • Red Hat Enterprise Linux Server (v. 7) openssh 6.6.1p1-11.el7, openssh-keycat 6.6.1p1-11.el7, openssh-server 6.6.1p1-11.el7, openssh-askpass 6.6.1p1-11.el7, openssh-clients 6.6.1p1-11.el7
    fixed: vendor fix RHSA-2015:0425
  • Red Hat Enterprise Linux Server Optional (v. 6) openssh-ldap 5.3p1-104.el6, pam_ssh_agent_auth 0.9.3-104.el6
    fixed: vendor fix RHSA-2014:1552
  • Red Hat Enterprise Linux Server Optional (v. 7) openssh-ldap 6.6.1p1-11.el7, pam_ssh_agent_auth 0.9.3-9.11.el7, openssh-server-sysvinit 6.6.1p1-11.el7
    fixed: vendor fix RHSA-2015:0425
  • Red Hat Enterprise Linux Workstation (v. 6) openssh 5.3p1-104.el6, openssh-server 5.3p1-104.el6, openssh-askpass 5.3p1-104.el6, openssh-clients 5.3p1-104.el6
    fixed: vendor fix RHSA-2014:1552
  • Red Hat Enterprise Linux Workstation (v. 7) openssh 6.6.1p1-11.el7, openssh-keycat 6.6.1p1-11.el7, openssh-server 6.6.1p1-11.el7, openssh-askpass 6.6.1p1-11.el7, openssh-clients 6.6.1p1-11.el7
    fixed: vendor fix RHSA-2015:0425
show 2 more
  • Red Hat Enterprise Linux Workstation Optional (v. 6) openssh-ldap 5.3p1-104.el6, pam_ssh_agent_auth 0.9.3-104.el6
    fixed: vendor fix RHSA-2014:1552
  • Red Hat Enterprise Linux Workstation Optional (v. 7) openssh-ldap 6.6.1p1-11.el7, pam_ssh_agent_auth 0.9.3-9.11.el7, openssh-server-sysvinit 6.6.1p1-11.el7
    fixed: vendor fix RHSA-2015:0425

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 SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5mo ago

Exploit prediction

1.99% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.debian.org https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=742513 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation

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.