high
8.1
CWE
362 364
EPSS
71.475%
Advisory Published
CVE Published
Advisory Published
Advisory Published
Advisory Published
Updated

CVE-2024-6387: OpenSSH regreSSHion Attack (CVE-2024-6387)

First published: Thu Jun 27 2024(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com CVE-2024-6387 CVE-2024-6387 CVE-2024-6387

Affected SoftwareAffected VersionHow to fix
Microsoft CBL Mariner 2.0 x64
fix available externally
Microsoft CBL Mariner 2.0 ARM
fix available externally
F5 BIG-IP Next>=20.1.0<=20.2.1
F5 BIG-IP Next Central Manager>=20.1.0<=20.2.1
F5 BIG-IP Next SPK>=1.7.0<=1.9.2
F5 BIG-IP Next CNF>=1.1.0<=1.3.1
Apple macOS Ventura<13.6.8
13.6.8
Apple macOS Monterey<12.7.6
12.7.6
Apple macOS Sonoma<14.6
14.6
Microsoft Azure Arc Resource Bridge
fix available externally
Microsoft Azure Kubernetes Service Node on Azure Linux
fix available externally
Microsoft Azure Kubernetes Service Node on Ubuntu Linux
fix available externally
Microsoft Azure Arc Resource Bridge
debian/openssh
1:8.4p1-5+deb11u3
1:9.2p1-2+deb12u3
1:9.8p1-8
Openbsd Openssh<4.4
Openbsd Openssh>=8.6<9.8
Openbsd Openssh=4.4
Openbsd Openssh=8.5-p1
Redhat Openshift Container Platform=4.0
Redhat Enterprise Linux=9.0
Redhat Enterprise Linux Eus=9.4
Redhat Enterprise Linux For Arm 64=9.0_aarch64
Redhat Enterprise Linux For Arm 64 Eus=9.4_aarch64
Redhat Enterprise Linux For Ibm Z Systems=9.0_s390x
Redhat Enterprise Linux For Ibm Z Systems Eus=9.4_s390x
Redhat Enterprise Linux For Power Little Endian=9.0_ppc64le
Redhat Enterprise Linux For Power Little Endian Eus=9.4_ppc64le
Redhat Enterprise Linux Server Aus=9.4
Suse Linux Enterprise Micro=6.0
Debian Debian Linux=12.0
Canonical Ubuntu Linux=22.04
Canonical Ubuntu Linux=22.10
Canonical Ubuntu Linux=23.04
Amazon Linux 2023
NetApp E-Series SANtricity OS Controller>=11.0.0<=11.70.2
NetApp ONTAP Select Deploy administration utility
Netapp Ontap Tools Vmware Vsphere=9
FreeBSD FreeBSD=13.2
FreeBSD FreeBSD=13.2-p1
FreeBSD FreeBSD=13.2-p10
FreeBSD FreeBSD=13.2-p11
FreeBSD FreeBSD=13.2-p2
FreeBSD FreeBSD=13.2-p3
FreeBSD FreeBSD=13.2-p4
FreeBSD FreeBSD=13.2-p5
FreeBSD FreeBSD=13.2-p6
FreeBSD FreeBSD=13.2-p7
FreeBSD FreeBSD=13.2-p8
FreeBSD FreeBSD=13.2-p9
FreeBSD FreeBSD=13.3
FreeBSD FreeBSD=13.3-p1
FreeBSD FreeBSD=13.3-p2
FreeBSD FreeBSD=13.3-p3
FreeBSD FreeBSD=14.0
FreeBSD FreeBSD=14.0-beta5
FreeBSD FreeBSD=14.0-p1
FreeBSD FreeBSD=14.0-p2
FreeBSD FreeBSD=14.0-p3
FreeBSD FreeBSD=14.0-p4
FreeBSD FreeBSD=14.0-p5
FreeBSD FreeBSD=14.0-p6
FreeBSD FreeBSD=14.0-p7
FreeBSD FreeBSD=14.0-rc3
FreeBSD FreeBSD=14.0-rc4-p1
FreeBSD FreeBSD=14.1
FreeBSD FreeBSD=14.1-p1
NetBSD NetBSD<=10.0.0
Microsoft Azure Arc Resource Bridge
fix available externally
redhat/openssh 8.7p1<38
38
Fortinet FortiADC>=7.4.0<=7.4.4
Fortinet FortiADC>=7.2.0<=7.2.6
Fortinet FortiAIOps>=2.0.0<=2.0.1
Fortinet FortiAnalyzer>=7.4.0<=7.4.3
Fortinet FortiAnalyzer>=7.2.0<=7.2.5
Fortinet FortiAnalyzer>=7.0.0<=7.0.12
Fortinet FortiAnalyzer>=6.4.0<=6.4.14
Fortinet FortiAnalyzer-BigData=.
Fortinet FortiAuthenticator>=6.6.0<=6.6.1
Fortinet FortiDDoS>=5.7.0<=5.7.3
Fortinet FortiDDoS-F>=7.0.0<=7.0.1
Fortinet FortiDeceptor>=5.3.0<=5.3.1
Fortinet FortiDeceptor=.
Fortinet FortiExtender>=7.4.0<=7.4.5
Fortinet FortiExtender>=7.2.0<=7.2.5
Fortinet FortiExtender>=7.0.0<=7.0.5
Fortinet FortiLANCloud>=23
Fortinet FortiLANCloud>=22
Fortinet FortiMail>=7.4.0<=7.4.2
Fortinet FortiMail>=7.2.0<=7.2.6
Fortinet FortiMail>=7.0.0<=7.0.7
Fortinet FortiMail>=6.4.0<=6.4.8
Fortinet FortiManager>=7.4.0<=7.4.3
Fortinet FortiManager>=7.2.0<=7.2.5
Fortinet FortiManager>=7.0.0<=7.0.12
Fortinet FortiManager>=6.4.0<=6.4.14
Fortinet FortiManager Cloud>=7.2.3<=7.2.4
Fortinet FortiManager Cloud=.
Fortinet FortiManager Cloud=.
Fortinet FortiManager Cloud>=7.0.6<=7.0.7
Fortinet FortiNAC-F=.
Fortinet FortiNAC-F>=7.2.0<=7.2.6
Fortinet FortiRecorder>=7.2.0<=7.2.1
Fortinet FortiRecorder>=7.0.0<=7.0.4
Fortinet FortiRecorder>=6.4.0<=6.4.5
Fortinet FortiRecorder>=6.0.0<=6.0.12
Fortinet FortiSwitch>=7.4.0<=7.4.3
Fortinet FortiSwitch>=7.2.0<=7.2.8
Fortinet FortiTester>=7.4.0<=7.4.2
Fortinet FortiTester>=7.3.0<=7.3.2
Fortinet FortiTester>=7.2.0<=7.2.3
Fortinet FortiVoice>=7.0.0<=7.0.2
Fortinet FortiVoice>=6.4.0<=6.4.9
Fortinet FortiWLC>=8.6.0<=8.6.7
Fortinet FortiWeb=.
Fortinet FortiWeb>=7.4.0<=7.4.4
Fortinet FortiWeb>=7.2.0<=7.2.9

Remedy

Set LoginGraceTime to 0 in /etc/ssh/sshd_config. This makes sshd vulnerable to a denial of service (the exhaustion of all MaxStartups connections), but it makes it safe from this vulnerability.

Remedy

https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html

Remedy

https://news.ycombinator.com/item?id=40843778

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