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

Configuration 1 (hide)

OR cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:4.4:-:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:8.5:p1:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:9.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_arm_64:9.0_aarch64:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_arm_64_eus:9.4_aarch64:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.4_s390x:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.4_ppc64le:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:9.4:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:suse:linux_enterprise_micro:6.0:*:*:*:*:*:*:*

Configuration 4 (hide)

cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

Configuration 5 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:22.10:*:*:*:-:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:23.04:*:*:*:lts:*:*:*

Configuration 6 (hide)

cpe:2.3:o:amazon:linux_2023:-:*:*:*:*:*:*:*

Configuration 7 (hide)

OR cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_tools:9:*:*:*:*:vmware_vsphere:*:*

Configuration 8 (hide)

OR cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.2:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.3:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.3:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.3:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:13.3:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.1:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.1:p1:*:*:*:*:*:*

Configuration 9 (hide)

cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*

History

24 Apr 2025, 19:15

Type Values Removed Values Added
References
  • () https://packetstorm.news/files/id/190587/ -
  • () https://www.exploit-db.com/exploits/52269 -

Information

Published : 2024-07-01 13:15

Updated : 2025-04-24 19:15


NVD link : CVE-2024-6387

Mitre link : CVE-2024-6387

CVE.ORG link : CVE-2024-6387


JSON object : View

Products Affected

redhat

  • enterprise_linux_server_aus
  • enterprise_linux_for_ibm_z_systems
  • openshift_container_platform
  • enterprise_linux_eus
  • enterprise_linux
  • enterprise_linux_for_power_little_endian_eus
  • enterprise_linux_for_arm_64
  • enterprise_linux_for_arm_64_eus
  • enterprise_linux_for_power_little_endian
  • enterprise_linux_for_ibm_z_systems_eus

netbsd

  • netbsd

netapp

  • ontap_tools
  • ontap_select_deploy_administration_utility
  • e-series_santricity_os_controller

canonical

  • ubuntu_linux

openbsd

  • openssh

amazon

  • linux_2023

debian

  • debian_linux

freebsd

  • freebsd

suse

  • linux_enterprise_micro
CWE
CWE-364

Signal Handler Race Condition

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')