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CVE-2024-6387

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.

Published

2024-07-01T13:15:06.467

Last Modified

2025-04-24T19:15:46.257

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.1 (HIGH)

Weaknesses

Type: Secondary
CWE-364
Type: Primary
CWE-362

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	openssh	< 4.4	Yes
Application	openbsd	openssh	< 9.8	Yes
Application	openbsd	openssh	4.4	Yes
Application	openbsd	openssh	8.5	Yes
Application	redhat	openshift_container_platform	4.0	Yes
Operating System	redhat	enterprise_linux	9.0	Yes
Operating System	redhat	enterprise_linux_eus	9.4	Yes
Operating System	redhat	enterprise_linux_for_arm_64	9.0_aarch64	Yes
Operating System	redhat	enterprise_linux_for_arm_64_eus	9.4_aarch64	Yes
Operating System	redhat	enterprise_linux_for_ibm_z_systems	9.0_s390x	Yes
Operating System	redhat	enterprise_linux_for_ibm_z_systems_eus	9.4_s390x	Yes
Operating System	redhat	enterprise_linux_for_power_little_endian	9.0_ppc64le	Yes
Operating System	redhat	enterprise_linux_for_power_little_endian_eus	9.4_ppc64le	Yes
Operating System	redhat	enterprise_linux_server_aus	9.4	Yes
Operating System	suse	linux_enterprise_micro	6.0	Yes
Operating System	debian	debian_linux	12.0	Yes
Operating System	canonical	ubuntu_linux	22.04	Yes
Operating System	canonical	ubuntu_linux	22.10	Yes
Operating System	canonical	ubuntu_linux	23.04	Yes
Operating System	amazon	linux_2023	-	Yes
Application	netapp	e-series_santricity_os_controller	≤ 11.70.2	Yes
Application	netapp	ontap_select_deploy_administration_utility	-	Yes
Application	netapp	ontap_tools	9	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.2	Yes
Operating System	freebsd	freebsd	13.3	Yes
Operating System	freebsd	freebsd	13.3	Yes
Operating System	freebsd	freebsd	13.3	Yes
Operating System	freebsd	freebsd	13.3	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.0	Yes
Operating System	freebsd	freebsd	14.1	Yes
Operating System	freebsd	freebsd	14.1	Yes
Operating System	netbsd	netbsd	≤ 10.0.0	Yes

References

https://access.redhat.com/errata/RHSA-2024:4312 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2024:4340 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2024:4389 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2024:4469 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2024:4474 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2024:4479 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2024:4484 Third Party Advisory ([email protected])
https://access.redhat.com/security/cve/CVE-2024-6387 Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=2294604 Issue Tracking, Third Party Advisory ([email protected])
https://santandersecurityresearch.github.io/blog/sshing_the_masses.html ([email protected])
https://www.openssh.com/txt/release-9.8 Release Notes, Third Party Advisory ([email protected])
https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt Exploit, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2024/Jul/18 (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2024/Jul/19 (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2024/Jul/20 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/01/12 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/01/13 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/02/1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/03/1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/03/11 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/03/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/03/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/03/4 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/03/5 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/04/1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/04/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/08/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/08/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/09/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/09/5 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/10/1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/10/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/10/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/10/4 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/10/6 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/11/1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/11/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/23/4 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/23/6 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/28/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/28/3 (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4312 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4340 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4389 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4469 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4474 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4479 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2024:4484 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/security/cve/CVE-2024-6387 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/ (af854a3a-2127-422b-91ae-364da2661108)
https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/ (af854a3a-2127-422b-91ae-364da2661108)
https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=2294604 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://explore.alas.aws.amazon.com/CVE-2024-6387.html (af854a3a-2127-422b-91ae-364da2661108)
https://forum.vmssoftware.com/viewtopic.php?f=8&t=9132 (af854a3a-2127-422b-91ae-364da2661108)
https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/AlmaLinux/updates/issues/629 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/Azure/AKS/issues/4379 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/PowerShell/Win32-OpenSSH/discussions/2248 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/PowerShell/Win32-OpenSSH/issues/2249 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/microsoft/azurelinux/issues/9555 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/oracle/oracle-linux/issues/149 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rapier1/hpn-ssh/issues/87 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/zgzhang/cve-2024-6387-poc (af854a3a-2127-422b-91ae-364da2661108)
https://lists.almalinux.org/archives/list/[email protected]/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html (af854a3a-2127-422b-91ae-364da2661108)
https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html (af854a3a-2127-422b-91ae-364da2661108)
https://news.ycombinator.com/item?id=40843778 (af854a3a-2127-422b-91ae-364da2661108)
https://packetstorm.news/files/id/190587/ (af854a3a-2127-422b-91ae-364da2661108)
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010 (af854a3a-2127-422b-91ae-364da2661108)
https://santandersecurityresearch.github.io/blog/sshing_the_masses.html (af854a3a-2127-422b-91ae-364da2661108)
https://security-tracker.debian.org/tracker/CVE-2024-6387 (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20240701-0001/ (af854a3a-2127-422b-91ae-364da2661108)
https://sig-security.rocky.page/issues/CVE-2024-6387/ (af854a3a-2127-422b-91ae-364da2661108)
https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/ (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT214118 (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT214119 (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT214120 (af854a3a-2127-422b-91ae-364da2661108)
https://ubuntu.com/security/CVE-2024-6387 (af854a3a-2127-422b-91ae-364da2661108)
https://ubuntu.com/security/notices/USN-6859-1 (af854a3a-2127-422b-91ae-364da2661108)
https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do (af854a3a-2127-422b-91ae-364da2661108)
https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100 (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/52269 (af854a3a-2127-422b-91ae-364da2661108)
https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc (af854a3a-2127-422b-91ae-364da2661108)
https://www.openssh.com/txt/release-9.8 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.suse.com/security/cve/CVE-2024-6387.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.theregister.com/2024/07/01/regresshion_openssh/ (af854a3a-2127-422b-91ae-364da2661108)
https://www.vicarius.io/vsociety/posts/regresshion-an-openssh-regression-error-cve-2024-6387 (af854a3a-2127-422b-91ae-364da2661108)