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f5F5F5:K000140222
HistoryJul 01, 2024 - 12:00 a.m.

K000140222: OpenSSH server vulnerability CVE-2024-6387

2024-07-0100:00:00
my.f5.com
80
openssh
server
vulnerability
signal handler
race condition
ssh
authentication

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.7 Medium

AI Score

Confidence

Low

0.0005 Low

EPSS

Percentile

17.3%

Security Advisory Description

A signal handler race condition was found in OpenSSH’s server (sshd), where a client does not authenticate within LoginGraceTime seconds (120 by default, 600 in old OpenSSH versions), then sshd’s SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). (CVE-2024-6387)

Impact

For products with Nonein the Versions known to be vulnerable column, there is no impact.

For products with ****** in the various columns, F5 is still researching the issue and will update this article after confirming the required information. F5 Support has no additional information about this issue.

Affected configurations

Vulners
Node
f5big-ip_nextMatch20.1.0
OR
f5big-ip_nextMatch20.1.1
OR
f5big-ip_nextMatch20.2.0
OR
f5big-ip_nextMatch1.1.0
OR
f5big-ip_nextMatch1.1.1
OR
f5big-ip_nextMatch1.2.0
OR
f5big-ip_nextMatch1.2.1
OR
f5big-ip_nextMatch1.3.0
OR
f5big-ip_dnsMatch1.1.0
OR
f5big-ip_dnsMatch1.1.1
OR
f5big-ip_dnsMatch1.2.0
OR
f5big-ip_dnsMatch1.2.1
OR
f5big-ip_dnsMatch1.3.0
OR
f5big-ip_nextMatch1.1.0
OR
f5big-ip_nextMatch1.1.1
OR
f5big-ip_nextMatch1.2.0
OR
f5big-ip_nextMatch1.2.1
OR
f5big-ip_nextMatch1.3.0
OR
f5big-ip_ltmMatch20.1.0
OR
f5big-ip_ltmMatch20.2.0
OR
f5big-ip_nextMatch1.5.0
OR
f5big-ip_nextMatch1.6.0
OR
f5big-ip_nextMatch1.7.0
OR
f5big-ip_nextMatch1.7.1
OR
f5big-ip_nextMatch1.7.2
OR
f5big-ip_nextMatch1.7.3
OR
f5big-ip_nextMatch1.7.4
OR
f5big-ip_nextMatch1.7.5
OR
f5big-ip_nextMatch1.7.6
OR
f5big-ip_nextMatch1.7.7
OR
f5big-ip_nextMatch1.7.8
OR
f5big-ip_nextMatch1.8.0
OR
f5big-ip_nextMatch1.8.2
OR
f5big-ip_nextMatch1.9.0
OR
f5big-ip_nextMatch1.9.1
OR
f5big-ip_nextMatch1.9.2
OR
f5big-ip_nextMatch20.1.0
OR
f5big-ip_nextMatch20.2.0
OR
f5big-ipMatch15.1.0
OR
f5big-ipMatch15.1.1
OR
f5big-ipMatch15.1.10
OR
f5big-ipMatch15.1.2
OR
f5big-ipMatch15.1.3
OR
f5big-ipMatch15.1.4
OR
f5big-ipMatch15.1.5
OR
f5big-ipMatch15.1.6
OR
f5big-ipMatch15.1.7
OR
f5big-ipMatch15.1.8
OR
f5big-ipMatch15.1.9
OR
f5big-ip_afmMatch15.1.0
OR
f5big-ip_afmMatch15.1.1
OR
f5big-ip_afmMatch15.1.10
OR
f5big-ip_afmMatch15.1.2
OR
f5big-ip_afmMatch15.1.3
OR
f5big-ip_afmMatch15.1.4
OR
f5big-ip_afmMatch15.1.5
OR
f5big-ip_afmMatch15.1.6
OR
f5big-ip_afmMatch15.1.7
OR
f5big-ip_afmMatch15.1.8
OR
f5big-ip_afmMatch15.1.9
OR
f5big-ip_afmMatch16.1.0
OR
f5big-ip_afmMatch16.1.1
OR
f5big-ip_afmMatch16.1.2
OR
f5big-ip_afmMatch16.1.3
OR
f5big-ip_afmMatch16.1.4
OR
f5big-ip_afmMatch17.1.0
OR
f5big-ip_afmMatch17.1.1
OR
f5big-ip_analyticsMatch15.1.0
OR
f5big-ip_analyticsMatch15.1.1
OR
f5big-ip_analyticsMatch15.1.10
OR
f5big-ip_analyticsMatch15.1.2
OR
f5big-ip_analyticsMatch15.1.3
OR
f5big-ip_analyticsMatch15.1.4
OR
f5big-ip_analyticsMatch15.1.5
OR
f5big-ip_analyticsMatch15.1.6
OR
f5big-ip_analyticsMatch15.1.7
OR
f5big-ip_analyticsMatch15.1.8
OR
f5big-ip_analyticsMatch15.1.9
OR
f5big-ip_analyticsMatch16.1.0
OR
f5big-ip_analyticsMatch16.1.1
OR
f5big-ip_analyticsMatch16.1.2
OR
f5big-ip_analyticsMatch16.1.3
OR
f5big-ip_analyticsMatch16.1.4
OR
f5big-ip_analyticsMatch17.1.0
OR
f5big-ip_analyticsMatch17.1.1
OR
f5big-ip_apmMatch15.1.0
OR
f5big-ip_apmMatch15.1.1
OR
f5big-ip_apmMatch15.1.10
OR
f5big-ip_apmMatch15.1.2
OR
f5big-ip_apmMatch15.1.3
OR
f5big-ip_apmMatch15.1.4
OR
f5big-ip_apmMatch15.1.5
OR
f5big-ip_apmMatch15.1.6
OR
f5big-ip_apmMatch15.1.7
OR
f5big-ip_apmMatch15.1.8
OR
f5big-ip_apmMatch15.1.9
OR
f5big-ip_apmMatch16.1.0
OR
f5big-ip_apmMatch16.1.1
OR
f5big-ip_apmMatch16.1.2
OR
f5big-ip_apmMatch16.1.3
OR
f5big-ip_apmMatch16.1.4
OR
f5big-ip_apmMatch17.1.0
OR
f5big-ip_apmMatch17.1.1
OR
f5big-ip_asmMatch15.1.0
OR
f5big-ip_asmMatch15.1.1
OR
f5big-ip_asmMatch15.1.10
OR
f5big-ip_asmMatch15.1.2
OR
f5big-ip_asmMatch15.1.3
OR
f5big-ip_asmMatch15.1.4
OR
f5big-ip_asmMatch15.1.5
OR
f5big-ip_asmMatch15.1.6
OR
f5big-ip_asmMatch15.1.7
OR
f5big-ip_asmMatch15.1.8
OR
f5big-ip_asmMatch15.1.9
OR
f5big-ip_asmMatch16.1.0
OR
f5big-ip_asmMatch16.1.1
OR
f5big-ip_asmMatch16.1.2
OR
f5big-ip_asmMatch16.1.3
OR
f5big-ip_asmMatch16.1.4
OR
f5big-ip_asmMatch17.1.0
OR
f5big-ip_asmMatch17.1.1
OR
f5big-ip_dnsMatch15.1.0
OR
f5big-ip_dnsMatch15.1.1
OR
f5big-ip_dnsMatch15.1.10
OR
f5big-ip_dnsMatch15.1.2
OR
f5big-ip_dnsMatch15.1.3
OR
f5big-ip_dnsMatch15.1.4
OR
f5big-ip_dnsMatch15.1.5
OR
f5big-ip_dnsMatch15.1.6
OR
f5big-ip_dnsMatch15.1.7
OR
f5big-ip_dnsMatch15.1.8
OR
f5big-ip_dnsMatch15.1.9
OR
f5big-ip_dnsMatch16.1.0
OR
f5big-ip_dnsMatch16.1.1
OR
f5big-ip_dnsMatch16.1.2
OR
f5big-ip_dnsMatch16.1.3
OR
f5big-ip_dnsMatch16.1.4
OR
f5big-ip_dnsMatch17.1.0
OR
f5big-ip_dnsMatch17.1.1
OR
f5big-ipMatch15.1.0
OR
f5big-ipMatch15.1.1
OR
f5big-ipMatch15.1.10
OR
f5big-ipMatch15.1.2
OR
f5big-ipMatch15.1.3
OR
f5big-ipMatch15.1.4
OR
f5big-ipMatch15.1.5
OR
f5big-ipMatch15.1.6
OR
f5big-ipMatch15.1.7
OR
f5big-ipMatch15.1.8
OR
f5big-ipMatch15.1.9
OR
f5big-ipMatch16.1.0
OR
f5big-ipMatch16.1.1
OR
f5big-ipMatch16.1.2
OR
f5big-ipMatch16.1.3
OR
f5big-ipMatch16.1.4
OR
f5big-ipMatch17.1.0
OR
f5big-ipMatch17.1.1
OR
f5big-ip_link_controllerMatch15.1.0
OR
f5big-ip_link_controllerMatch15.1.1
OR
f5big-ip_link_controllerMatch15.1.10
OR
f5big-ip_link_controllerMatch15.1.2
OR
f5big-ip_link_controllerMatch15.1.3
OR
f5big-ip_link_controllerMatch15.1.4
OR
f5big-ip_link_controllerMatch15.1.5
OR
f5big-ip_link_controllerMatch15.1.6
OR
f5big-ip_link_controllerMatch15.1.7
OR
f5big-ip_link_controllerMatch15.1.8
OR
f5big-ip_link_controllerMatch15.1.9
OR
f5big-ip_link_controllerMatch16.1.0
OR
f5big-ip_link_controllerMatch16.1.1
OR
f5big-ip_link_controllerMatch16.1.2
OR
f5big-ip_link_controllerMatch16.1.3
OR
f5big-ip_link_controllerMatch16.1.4
OR
f5big-ip_link_controllerMatch17.1.0
OR
f5big-ip_link_controllerMatch17.1.1
OR
f5big-ip_ltmMatch15.1.0
OR
f5big-ip_ltmMatch15.1.1
OR
f5big-ip_ltmMatch15.1.10
OR
f5big-ip_ltmMatch15.1.2
OR
f5big-ip_ltmMatch15.1.3
OR
f5big-ip_ltmMatch15.1.4
OR
f5big-ip_ltmMatch15.1.5
OR
f5big-ip_ltmMatch15.1.6
OR
f5big-ip_ltmMatch15.1.7
OR
f5big-ip_ltmMatch15.1.8
OR
f5big-ip_ltmMatch15.1.9
OR
f5big-ip_ltmMatch16.1.0
OR
f5big-ip_ltmMatch16.1.1
OR
f5big-ip_ltmMatch16.1.2
OR
f5big-ip_ltmMatch16.1.3
OR
f5big-ip_ltmMatch16.1.4
OR
f5big-ip_ltmMatch17.1.0
OR
f5big-ip_ltmMatch17.1.1
OR
f5big-ip_pemMatch15.1.0
OR
f5big-ip_pemMatch15.1.1
OR
f5big-ip_pemMatch15.1.10
OR
f5big-ip_pemMatch15.1.2
OR
f5big-ip_pemMatch15.1.3
OR
f5big-ip_pemMatch15.1.4
OR
f5big-ip_pemMatch15.1.5
OR
f5big-ip_pemMatch15.1.6
OR
f5big-ip_pemMatch15.1.7
OR
f5big-ip_pemMatch15.1.8
OR
f5big-ip_pemMatch15.1.9
OR
f5big-ip_pemMatch16.1.0
OR
f5big-ip_pemMatch16.1.1
OR
f5big-ip_pemMatch16.1.2
OR
f5big-ip_pemMatch16.1.3
OR
f5big-ip_pemMatch16.1.4
OR
f5big-ip_pemMatch17.1.0
OR
f5big-ip_pemMatch17.1.1
OR
f5nginx_agentMatch2.17.0
OR
f5nginx_agentMatch2.18.0
OR
f5nginx_agentMatch2.19.0
OR
f5nginx_agentMatch2.20.0
OR
f5nginx_agentMatch2.20.1
OR
f5nginx_agentMatch2.22.0
OR
f5nginx_agentMatch2.22.1
OR
f5nginx_agentMatch2.23.0
OR
f5nginx_agentMatch2.23.1
OR
f5nginx_agentMatch2.23.2
OR
f5nginx_agentMatch2.23.3
OR
f5nginx_agentMatch2.24.0
OR
f5nginx_agentMatch2.24.1
OR
f5nginx_agentMatch2.25.0
OR
f5nginx_agentMatch2.25.1
OR
f5nginx_agentMatch2.26.0
OR
f5nginx_agentMatch2.26.1
OR
f5nginx_agentMatch2.26.2
OR
f5nginx_agentMatch2.27.0
OR
f5nginx_agentMatch2.28.0
OR
f5nginx_agentMatch2.28.1
OR
f5nginx_agentMatch2.29.0
OR
f5nginx_agentMatch2.30.0
OR
f5nginx_agentMatch2.30.1
OR
f5nginx_agentMatch2.30.2
OR
f5nginx_agentMatch2.30.3
OR
f5nginx_agentMatch2.31.0
OR
f5nginx_agentMatch2.31.1
OR
f5nginx_agentMatch2.31.2
OR
f5nginx_agentMatch2.32.0
OR
f5nginx_agentMatch2.32.1
OR
f5nginx_agentMatch2.32.2
OR
f5nginx_agentMatch2.33.0
OR
f5nginx_agentMatch2.34.0
OR
f5nginx_agentMatch2.34.1
OR
f5nginx_agentMatch2.35.0
OR
f5nginx_agentMatch2.35.1
OR
f5nginx_api_connectivity_managerMatch1.0.0
OR
f5nginx_api_connectivity_managerMatch1.1.0
OR
f5nginx_api_connectivity_managerMatch1.1.1
OR
f5nginx_api_connectivity_managerMatch1.2.0
OR
f5nginx_api_connectivity_managerMatch1.3.0
OR
f5nginx_api_connectivity_managerMatch1.3.1
OR
f5nginx_api_connectivity_managerMatch1.4.0
OR
f5nginx_api_connectivity_managerMatch1.4.1
OR
f5nginx_api_connectivity_managerMatch1.5.0
OR
f5nginx_api_connectivity_managerMatch1.6.0
OR
f5nginx_api_connectivity_managerMatch1.7.0
OR
f5nginx_api_connectivity_managerMatch1.8.0
OR
f5nginx_api_connectivity_managerMatch1.9.0
OR
f5nginx_api_connectivity_managerMatch1.9.1
OR
f5nginx_api_connectivity_managerMatch1.9.2
OR
f5nginx_app_protectMatch2.4.0
OR
f5nginx_app_protectMatch3.0.0
OR
f5nginx_app_protectMatch3.1.0
OR
f5nginx_app_protectMatch4.0.1
OR
f5nginx_app_protectMatch4.1.0
OR
f5nginx_app_protectMatch4.2.0
OR
f5nginx_app_protectMatch4.3.0
OR
f5nginx_app_protectMatch4.4.0
OR
f5nginx_app_protectMatch3.11.0
OR
f5nginx_app_protectMatch3.12.1
OR
f5nginx_app_protectMatch3.12.2
OR
f5nginx_app_protectMatch4.0.0
OR
f5nginx_app_protectMatch4.1.0
OR
f5nginx_app_protectMatch4.10.0
OR
f5nginx_app_protectMatch4.2.0
OR
f5nginx_app_protectMatch4.3.0
OR
f5nginx_app_protectMatch4.4.0
OR
f5nginx_app_protectMatch4.5.0
OR
f5nginx_app_protectMatch4.6.0
OR
f5nginx_app_protectMatch4.7.0
OR
f5nginx_app_protectMatch4.8.0
OR
f5nginx_app_protectMatch4.8.1
OR
f5nginx_app_protectMatch4.9.0
OR
f5nginx_app_protectMatch5.0.0
OR
f5nginx_app_protectMatch5.1.0
OR
f5nginx_app_protectMatch5.2.0
OR
f5nginx_controllerMatch3.18.3
OR
f5nginx_controllerMatch3.19.1-apim
OR
f5nginx_controllerMatch3.19.2-apim
OR
f5nginx_controllerMatch3.19.3-apim
OR
f5nginx_controllerMatch3.19.4-apim
OR
f5nginx_controllerMatch3.19.5-apim
OR
f5nginx_controllerMatch3.19.6-apim
OR
f5nginx_controllerMatch3.20.0
OR
f5nginx_controllerMatch3.20.1
OR
f5nginx_controllerMatch3.21.0
OR
f5nginx_controllerMatch3.22.0
OR
f5nginx_controllerMatch3.22.1
OR
f5nginx_controllerMatch3.22.2
OR
f5nginx_controllerMatch3.22.3
OR
f5nginx_controllerMatch3.22.4
OR
f5nginx_controllerMatch3.22.5
OR
f5nginx_controllerMatch3.22.6
OR
f5nginx_controllerMatch3.22.7
OR
f5nginx_controllerMatch3.22.8
OR
f5nginx_controllerMatch3.22.9
OR
f5nginx_ingress_controllerMatch1.12.5
OR
f5nginx_ingress_controllerMatch2.2.1
OR
f5nginx_ingress_controllerMatch2.2.2
OR
f5nginx_ingress_controllerMatch2.3.0
OR
f5nginx_ingress_controllerMatch2.4.0
OR
f5nginx_ingress_controllerMatch2.4.1
OR
f5nginx_ingress_controllerMatch2.4.2
OR
f5nginx_ingress_controllerMatch3.0.0
OR
f5nginx_ingress_controllerMatch3.0.1
OR
f5nginx_ingress_controllerMatch3.0.2
OR
f5nginx_ingress_controllerMatch3.1.0
OR
f5nginx_ingress_controllerMatch3.1.1
OR
f5nginx_ingress_controllerMatch3.2.0
OR
f5nginx_ingress_controllerMatch3.2.1
OR
f5nginx_ingress_controllerMatch3.3.0
OR
f5nginx_ingress_controllerMatch3.3.1
OR
f5nginx_ingress_controllerMatch3.4.0
OR
f5nginx_ingress_controllerMatch3.4.1
OR
f5nginx_ingress_controllerMatch3.4.2
OR
f5nginx_ingress_controllerMatch3.5.0
OR
f5nginx_ingress_controllerMatch3.5.1
OR
f5nginx_ingress_controllerMatch3.5.2
OR
f5nginx_ingress_controllerMatch3.6.0
OR
f5nginx_instance_managerMatch2.10.0
OR
f5nginx_instance_managerMatch2.10.1
OR
f5nginx_instance_managerMatch2.11.0
OR
f5nginx_instance_managerMatch2.12.0
OR
f5nginx_instance_managerMatch2.13.0
OR
f5nginx_instance_managerMatch2.13.1
OR
f5nginx_instance_managerMatch2.14.0
OR
f5nginx_instance_managerMatch2.14.1
OR
f5nginx_instance_managerMatch2.15.0
OR
f5nginx_instance_managerMatch2.15.1
OR
f5nginx_instance_managerMatch2.16.0
OR
f5nginx_instance_managerMatch2.2.0
OR
f5nginx_instance_managerMatch2.3.0
OR
f5nginx_instance_managerMatch2.3.1
OR
f5nginx_instance_managerMatch2.4.0
OR
f5nginx_instance_managerMatch2.5.0
OR
f5nginx_instance_managerMatch2.5.1
OR
f5nginx_instance_managerMatch2.6.0
OR
f5nginx_instance_managerMatch2.7.0
OR
f5nginx_instance_managerMatch2.8.0
OR
f5nginx_instance_managerMatch2.9.0
OR
f5nginx_instance_managerMatch2.9.1
OR
f5nginx_security_monitoringMatch1.0.0
OR
f5nginx_security_monitoringMatch1.1.0
OR
f5nginx_security_monitoringMatch1.2.0
OR
f5nginx_security_monitoringMatch1.3.0
OR
f5nginx_security_monitoringMatch1.4.0
OR
f5nginx_security_monitoringMatch1.5.0
OR
f5nginx_security_monitoringMatch1.6.0
OR
f5nginx_security_monitoringMatch1.7.0
OR
f5nginx_security_monitoringMatch1.7.1
OR
f5nginxMatchr27plus
OR
f5nginxMatchr28plus
OR
f5nginxMatchr29plus
OR
f5nginxMatchr30plus
OR
f5nginxMatchr31plus
OR
f5nginxMatchr32plus
OR
f5nginx_service_meshMatch1.1.0
OR
f5nginx_service_meshMatch1.2.0
OR
f5nginx_service_meshMatch1.2.1
OR
f5nginx_service_meshMatch1.3.0
OR
f5nginx_service_meshMatch1.3.1
OR
f5nginx_service_meshMatch1.4.0
OR
f5nginx_service_meshMatch1.4.1
OR
f5nginx_service_meshMatch1.5.0
OR
f5nginx_service_meshMatch1.6.0
OR
f5nginx_service_meshMatch1.7.0
OR
f5nginx_service_meshMatch2.0.0
OR
f5nginxMatch1.27.0
OR
f5nginxMatch1.28.0
OR
f5nginxMatch1.29.0
OR
f5nginxMatch1.29.1
OR
f5nginxMatch1.30.0
OR
f5nginxMatch1.31.0
OR
f5nginxMatch1.31.1
OR
f5nginxMatch1.32.0
OR
f5nginxMatch1.32.1
OR
f5f5os-aMatch1.5.1
OR
f5f5os-aMatch1.5.2
OR
f5f5os-aMatch1.7.0
OR
f5f5os-cMatch1.6.0
OR
f5f5os-cMatch1.6.1
OR
f5f5os-cMatch1.6.2
OR
f5big-iq_centralized_managementMatch8.2.0
OR
f5big-iq_centralized_managementMatch8.3.0
OR
f5big-ip_ddos_hybrid_defenderMatch15.1.0
OR
f5big-ip_ddos_hybrid_defenderMatch15.1.1
OR
f5big-ip_ddos_hybrid_defenderMatch16.1.0
OR
f5big-ip_ddos_hybrid_defenderMatch17.1.0
OR
f5ssl_orchestratorMatch15.1.0
OR
f5ssl_orchestratorMatch15.1.1
OR
f5ssl_orchestratorMatch15.1.2
OR
f5ssl_orchestratorMatch15.1.9
OR
f5ssl_orchestratorMatch16.1.0
OR
f5ssl_orchestratorMatch16.1.1
OR
f5ssl_orchestratorMatch16.1.3
OR
f5ssl_orchestratorMatch16.1.4
OR
f5ssl_orchestratorMatch17.1.0
OR
f5ssl_orchestratorMatch17.1.1
OR
f5traffix_signaling_delivery_controllerMatch5.1.0
OR
f5traffix_signaling_delivery_controllerMatch5.2.0

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.7 Medium

AI Score

Confidence

Low

0.0005 Low

EPSS

Percentile

17.3%