🛡️ CVE-2024-6387 — 500f-firmware
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10
Description
A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
Affected software
CVE-2024-6387 is recorded against 53 packages.
- 500f-firmware
- 8300-firmware
- 8700-firmware
- a150-firmware
- a1k-firmware
- a220-firmware
- a250-firmware
- a400-firmware
- a70-firmware
- a700s-firmware
- a800-firmware
- a90-firmware
- a900-firmware
- a9500-firmware
- active-iq-unified-manager
- almalinux
- amazon-linux
- bootstrap-os
- c190-firmware
- c250-firmware
- c400-firmware
- c800-firmware
- debian-linux
- e-series-santricity-os-controller (from 11.0.0 up to 11.70.2)
Show the remaining 29 packages
- enterprise-linux
- enterprise-linux-eus
- enterprise-linux-for-arm-64
- enterprise-linux-for-arm-64-eus
- enterprise-linux-for-ibm-z-systems
- enterprise-linux-for-ibm-z-systems-eus
- enterprise-linux-for-power-little-endian
- enterprise-linux-for-power-little-endian-eus
- enterprise-linux-server-aus
- eos (from 4.32.0 up to 4.32.1f)
- fas2720-firmware
- fas2750-firmware
- fas2820-firmware
- freebsd
- linux-enterprise-micro
- macos (from 14.0 up to 14.6)
- netbsd (fixed in 10.0.0)
- ontap
- ontap-select-deploy-administration-utility
- ontap-tools
- openshift-container-platform
- openssh
- sma-6200-firmware
- sma-6210-firmware
- sma-7200-firmware
- sma-7210-firmware
- sma-8200v-firmware
- sra-ex-7000-firmware
- ubuntu-linux
Timeline and source
Published on 1 July 2024 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.
References
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
bugzilla.redhat.com
santandersecurityresearch.github.io
www.openssh.com
www.qualys.com
seclists.org
seclists.org
seclists.org
CVE-2024-6387 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
Severity
HIGH
CVSS Score
8.1
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-364
Public Exploit
⚠️ Yes
Source
NVD
Published
2024-07-01
Updated
2026-08-11
Modified
2026-06-17
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| 500f-firmware | — | — |
| 8300-firmware | — | — |
| 8700-firmware | — | — |
| a150-firmware | — | — |
| a1k-firmware | — | — |
| a220-firmware | — | — |
| a250-firmware | — | — |
| a400-firmware | — | — |
| a70-firmware | — | — |
| a700s-firmware | — | — |
| a800-firmware | — | — |
| a90-firmware | — | — |
| a900-firmware | — | — |
| a9500-firmware | — | — |
| active-iq-unified-manager | — | — |
| almalinux | — | — |
| amazon-linux | — | — |
| bootstrap-os | — | — |
| c190-firmware | — | — |
| c250-firmware | — | — |
| c400-firmware | — | — |
| c800-firmware | — | — |
| debian-linux | — | — |
| e-series-santricity-os-controller | 11.0.0 | 11.70.2 |
| enterprise-linux | — | — |
| enterprise-linux-eus | — | — |
| enterprise-linux-for-arm-64 | — | — |
| enterprise-linux-for-arm-64-eus | — | — |
| enterprise-linux-for-ibm-z-systems | — | — |
| enterprise-linux-for-ibm-z-systems-eus | — | — |
| enterprise-linux-for-power-little-endian | — | — |
| enterprise-linux-for-power-little-endian-eus | — | — |
| enterprise-linux-server-aus | — | — |
| eos | 4.32.0 | 4.32.1f |
| fas2720-firmware | — | — |
| fas2750-firmware | — | — |
| fas2820-firmware | — | — |
| freebsd | — | — |
| linux-enterprise-micro | — | — |
| macos | 14.0 | 14.6 |
| netbsd | — | 10.0.0 |
| ontap | — | — |
| ontap-select-deploy-administration-utility | — | — |
| ontap-tools | — | — |
| openshift-container-platform | — | — |
| openssh | — | — |
| sma-6200-firmware | — | — |
| sma-6210-firmware | — | — |
| sma-7200-firmware | — | — |
| sma-7210-firmware | — | — |
| sma-8200v-firmware | — | — |
| sra-ex-7000-firmware | — | — |
| ubuntu-linux | — | — |
References
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4312
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4340
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4389
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4469
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4474
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4479
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4484
Third Party Advisory https://access.redhat.com/security/cve/CVE-2024-6387
Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2294604
Exploit, Third Party Advisory https://santandersecurityresearch.github.io/blog/sshing_the_masses.html
Release Notes, Third Party Advisory https://www.openssh.com/txt/release-9.8
Exploit, Third Party Advisory https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt
Mailing List http://seclists.org/fulldisclosure/2024/Jul/18
Mailing List http://seclists.org/fulldisclosure/2024/Jul/19
Mailing List http://seclists.org/fulldisclosure/2024/Jul/20
Exploit, Mailing List http://www.openwall.com/lists/oss-security/2024/07/03/11
Mailing List, Patch http://www.openwall.com/lists/oss-security/2024/07/03/3
Exploit, Mailing List http://www.openwall.com/lists/oss-security/2024/07/04/2
Exploit, Mailing List http://www.openwall.com/lists/oss-security/2024/07/08/2
Exploit, Mailing List http://www.openwall.com/lists/oss-security/2024/07/09/5
Exploit, Mailing List http://www.openwall.com/lists/oss-security/2024/07/10/1
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4312
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4340
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4389
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4469
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4474
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4479
Third Party Advisory https://access.redhat.com/errata/RHSA-2024:4484
Third Party Advisory https://access.redhat.com/security/cve/CVE-2024-6387
Third Party Advisory https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/
Press/Media Coverage, Third Party Advisory https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/
Press/Media Coverage, Third Party Advisory https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server
Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2294604
Third Party Advisory https://explore.alas.aws.amazon.com/CVE-2024-6387.html
Issue Tracking https://forum.vmssoftware.com/viewtopic.php?f=8&t=9132
Issue Tracking https://github.com/AlmaLinux/updates/issues/629
Issue Tracking https://github.com/Azure/AKS/issues/4379
Issue Tracking https://github.com/PowerShell/Win32-OpenSSH/discussions/2248
Issue Tracking https://github.com/PowerShell/Win32-OpenSSH/issues/2249
Issue Tracking https://github.com/microsoft/azurelinux/issues/9555
Issue Tracking https://github.com/oracle/oracle-linux/issues/149
Issue Tracking https://github.com/rapier1/hpn-ssh/issues/87
Third Party Advisory https://github.com/zgzhang/cve-2024-6387-poc
Third Party Advisory https://lists.almalinux.org/archives/list/[email protected]/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY/
Mailing List, Release Notes https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
Mailing List, Patch https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html
Issue Tracking, Patch https://news.ycombinator.com/item?id=40843778
Broken Link https://packetstorm.news/files/id/190587/
Third Party Advisory https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010
Exploit, Third Party Advisory https://santandersecurityresearch.github.io/blog/sshing_the_masses.html
Third Party Advisory https://security-tracker.debian.org/tracker/CVE-2024-6387
Third Party Advisory https://security.netapp.com/advisory/ntap-20240701-0001/
Third Party Advisory https://sig-security.rocky.page/issues/CVE-2024-6387/
Press/Media Coverage, Third Party Advisory https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/
Third Party Advisory https://support.apple.com/kb/HT214118
Third Party Advisory https://support.apple.com/kb/HT214119
Third Party Advisory https://support.apple.com/kb/HT214120
Third Party Advisory https://ubuntu.com/security/CVE-2024-6387
Third Party Advisory https://ubuntu.com/security/notices/USN-6859-1
Third Party Advisory https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do
Third Party Advisory https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100
Third Party Advisory https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc
Release Notes, Third Party Advisory https://www.openssh.com/txt/release-9.8
Exploit, Third Party Advisory https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt
Third Party Advisory https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html
Third Party Advisory https://www.suse.com/security/cve/CVE-2024-6387.html
Press/Media Coverage, Third Party Advisory https://www.theregister.com/2024/07/01/regresshion_openssh/
Exploit, Third Party Advisory https://www.vicarius.io/vsociety/posts/regresshion-an-openssh-regression-error-cve-2024-6387
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Exploit Protection
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