openssh: loading of untrusted PKCS#11 modules in ssh-agent
Published Jan 5, 2017
7.3
HIGHCVSS 3.1
EPSS 37.43%
Description
Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4 allows remote attackers to execute arbitrary local PKCS#11 modules by leveraging control over a forwarded agent-socket.
Affected products
No data.
No data.
Red Hat Enterprise Linux 7
openssh-0:7.4p1-11.el7
Fixed · RHSA-2017:2029
Red Hat Enterprise Linux 4
openssh
Will not fix
Red Hat Enterprise Linux 5
openssh
Will not fix
Red Hat Enterprise Linux 6
openssh
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | openssh-0:7.4p1-11.el7 | Fixed | RHSA-2017:2029 |
| Red Hat Enterprise Linux 4 | openssh | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | openssh | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | openssh | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
In order to exploit this flaw, the attacker needs to have control of the forwarded agent-socket and the ability to write to the filesystem of the host running ssh-agent. Because of this restriction for successful exploitation, this issue has been rated as having Moderate security impact. A future update may address this flaw.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed May 29, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 37.43% (0.37431) | 98.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 37.43% (0.37431) | 98.33th | v5 (v2026.06.15) |
| May 13, 2026 | 1.17% (0.01168) | 78.82th | v4 (v2025.03.14) |
| Nov 1, 2025 | 2.27% (0.02274) | 84.15th | v4 (v2025.03.14) |
| Oct 28, 2025 | 1.17% (0.01168) | 77.96th | v4 (v2025.03.14) |
| Oct 27, 2025 | 3.25% (0.03254) | 86.64th | v4 (v2025.03.14) |
| Oct 11, 2025 | 1.17% (0.01168) | 77.87th | v4 (v2025.03.14) |
| Oct 1, 2025 | 2.27% (0.02274) | 84.13th | v4 (v2025.03.14) |
| Sep 4, 2025 | 3.34% (0.03341) | 86.82th | v4 (v2025.03.14) |
| Sep 1, 2025 | 5.99% (0.05989) | 90.39th | v4 (v2025.03.14) |
| Aug 4, 2025 | 3.25% (0.03254) | 86.65th | v4 (v2025.03.14) |
| Aug 1, 2025 | 5.84% (0.05838) | 90.25th | v4 (v2025.03.14) |
| Jul 30, 2025 | 3.25% (0.03254) | 86.65th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.62% (0.01622) | 80.15th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.40% (0.05398) | 83.17th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.62% (0.01622) | 80.56th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.41% (0.03413) | 91.28th | v3 (v2023.03.01) |
| Dec 12, 2024 | 10.53% (0.10533) | 95.29th | v3 (v2023.03.01) |
| Jul 21, 2023 | 10.15% (0.10155) | 94.14th | v3 (v2023.03.01) |
| May 22, 2023 | 7.69% (0.07690) | 93.18th | v3 (v2023.03.01) |
| Mar 7, 2023 | 9.50% (0.09498) | 93.73th | v3 (v2023.03.01) |
| Mar 6, 2023 | 18.33% (0.18327) | 96.32th | v2 (v2022.01.01) |
| Apr 1, 2022 | 18.33% (0.18327) | 95.99th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.33% (0.18327) | 93.57th | v2 (v2022.01.01) |
References (24)
- http://packetstormsecurity.com/files/140261/OpenSSH-Arbitrary-Library-Loading.html
- http://packetstormsecurity.com/files/173661/OpenSSH-Forwarded-SSH-Agent-Remote-Code-Execution.html
- http://seclists.org/fulldisclosure/2023/Jul/31 mailing-list
- http://www.openwall.com/lists/oss-security/2016/12/19/2 mailing-listMailing ListRelease Notes
- http://www.openwall.com/lists/oss-security/2023/07/19/9 mailing-list
- http://www.openwall.com/lists/oss-security/2023/07/20/1 mailing-list
- http://www.securityfocus.com/bid/94968 vdb-entry
- http://www.securitytracker.com/id/1037490 vdb-entry
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.647637
- https://access.redhat.com/errata/RHSA-2017:2029 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2016-10009 Vendor Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1009
- https://bugzilla.redhat.com/show_bug.cgi?id=1406269 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://github.com/openbsd/src/commit/9476ce1dd37d3c3218d5640b74c34c65e5f4efe5 Patch
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html mailing-list
- https://nvd.nist.gov/vuln/detail/CVE-2016-10009
- https://security.FreeBSD.org/advisories/FreeBSD-SA-17:01.openssh.asc vendor-advisory
- https://security.netapp.com/advisory/ntap-20171130-0002/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us
- https://usn.ubuntu.com/3538-1/ vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2016-10009
- https://www.exploit-db.com/exploits/40963/ exploit
- https://www.openssh.com/txt/release-7.4
Change history (0)
No recorded changes yet.