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CVE-2023-25136 Details

Description

OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://bugzilla.mindrot.org/show_bug.cgi?id=3522	CVE	ExploitIssue TrackingThird Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig	CVE	PatchVendor Advisory
https://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946	CVE	PatchThird Party Advisory
https://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/	CVE	ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGAUIXJ3TEKCRKVWFQ6GDAGQFTIIGQQP/	CVE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7LKQDFZWKYHQ65TBSH2X2HJQ4V2THS3/	CVE
https://news.ycombinator.com/item?id=34711565	CVE	Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202307-01	CVE	Third Party Advisory
https://security.netapp.com/advisory/ntap-20230309-0003/	CVE	Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/02/02/2	CVE	ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/13/1	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/22/1	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/22/2	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/23/3	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/03/06/1	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/03/09/2	CVE	Mailing ListThird Party Advisory
https://bugzilla.mindrot.org/show_bug.cgi?id=3522	[email protected]	ExploitIssue TrackingThird Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/017_sshd.patch.sig	[email protected]	PatchVendor Advisory
https://github.com/openssh/openssh-portable/commit/486c4dc3b83b4b67d663fb0fa62bc24138ec3946	[email protected]	PatchThird Party Advisory
https://jfrog.com/blog/openssh-pre-auth-double-free-cve-2023-25136-writeup-and-proof-of-concept/	[email protected]	ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGAUIXJ3TEKCRKVWFQ6GDAGQFTIIGQQP/	[email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7LKQDFZWKYHQ65TBSH2X2HJQ4V2THS3/	[email protected]
https://news.ycombinator.com/item?id=34711565	[email protected]	Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202307-01	[email protected]	Third Party Advisory
https://security.netapp.com/advisory/ntap-20230309-0003/	[email protected]	Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/02/02/2	[email protected]	ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/13/1	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/22/1	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/22/2	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/23/3	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/03/06/1	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/03/09/2	[email protected]	Mailing ListThird Party Advisory

see all 32 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-415	Double Free	[email protected]
CWE-415	Double Free	CISA-ADP

Affected Products

Product	Versions
openbsd openssh	9.1
CPE cpe:2.3:a:openbsd:openssh:9.1:::::::* Remediation No remediation found in references.
fedoraproject fedora	37 38
CPE cpe:2.3:o:fedoraproject:fedora:37:::::::* cpe:2.3:o:fedoraproject:fedora:38:::::::* Remediation No remediation found in references.
netapp ontap select deploy administration utility	All versions
CPE cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:::::::* Remediation No remediation found in references.
netapp a250 firmware	All versions
CPE cpe:2.3:o:netapp:a250_firmware:-:::::::* Remediation No remediation found in references.
netapp a250	All versions
CPE cpe:2.3:h:netapp:a250:-:::::::* Remediation No remediation found in references.
netapp 500f firmware	All versions
CPE cpe:2.3:o:netapp:500f_firmware:-:::::::* Remediation No remediation found in references.
netapp 500f	All versions
CPE cpe:2.3:h:netapp:500f:-:::::::* Remediation No remediation found in references.
netapp c250 firmware	All versions
CPE cpe:2.3:o:netapp:c250_firmware:-:::::::* Remediation No remediation found in references.
netapp c250	All versions
CPE cpe:2.3:h:netapp:c250:-:::::::* Remediation No remediation found in references.

Change History

22 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
May 28, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 27, 2024	CPE Deprecation Remap	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Jul 21, 2023	Modified Analysis	[email protected]
Jul 20, 2023	CVE Modified	[email protected]
Apr 19, 2023	CVE Modified	[email protected]
Apr 18, 2023	CVE Modified	[email protected]
Mar 9, 2023	CVE Modified	[email protected]
Mar 9, 2023	CVE Modified	[email protected]
Mar 7, 2023	Modified Analysis	[email protected]
Mar 6, 2023	CVE Modified	[email protected]
Feb 23, 2023	CVE Modified	[email protected]
Feb 22, 2023	CVE Modified	[email protected]
Feb 22, 2023	CVE Modified	[email protected]
Feb 14, 2023	CVE Modified	[email protected]
Feb 13, 2023	CVE Modified	[email protected]
Feb 10, 2023	Initial Analysis	[email protected]
Feb 8, 2023	CVE Modified	[email protected]

CVE-2023-25136 Details

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Affected Products

CPE

Remediation

CPE

Remediation

CPE

Remediation

CPE

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CPE

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Change History

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