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CVE-2024-6387
Detail
Awaiting Analysis
This vulnerability is currently awaiting analysis.
Description
A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead to 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.
Metrics
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Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/04/2 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 11:15:02 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/04/1 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 6:15:03 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/03/11 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 4:15:05 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/ [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/AlmaLinux/updates/issues/629 [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/Azure/AKS/issues/4379 [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/PowerShell/Win32-OpenSSH/discussions/2248 [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/PowerShell/Win32-OpenSSH/issues/2249 [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/microsoft/azurelinux/issues/9555 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 1:15:05 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:4312 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 9:15:03 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/03/5 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 8:15:02 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/03/4 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 5:15:07 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/03/3 [No types assigned]
CVE Modified by Red Hat, Inc.7/03/2024 4:15:10 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/03/1 [No types assigned]
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/03/2 [No types assigned]
CVE Modified by Red Hat, Inc.7/02/2024 7:15:11 PM
Action
Type
Old Value
New Value
Changed
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().
A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead to 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.
CVE Modified by Red Hat, Inc.7/02/2024 3:15:12 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc [No types assigned]
Added
Reference
Red Hat, Inc. https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc [No types assigned]
CVE Modified by Red Hat, Inc.7/02/2024 10:15:14 AM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/02/1 [No types assigned]
CVE Modified by Red Hat, Inc.7/01/2024 7:15:02 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://security.netapp.com/advisory/ntap-20240701-0001/ [No types assigned]
CVE Modified by Red Hat, Inc.7/01/2024 6:15:04 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/01/13 [No types assigned]
CVE Modified by Red Hat, Inc.7/01/2024 3:15:06 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010 [No types assigned]
Added
Reference
Red Hat, Inc. https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/ [No types assigned]
CVE Modified by Red Hat, Inc.7/01/2024 2:15:02 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/ [No types assigned]
Added
Reference
Red Hat, Inc. https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server [No types assigned]
Added
Reference
Red Hat, Inc. https://explore.alas.aws.amazon.com/CVE-2024-6387.html [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/oracle/oracle-linux/issues/149 [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/rapier1/hpn-ssh/issues/87 [No types assigned]
Added
Reference
Red Hat, Inc. https://github.com/zgzhang/cve-2024-6387-poc [No types assigned]
Added
Reference
Red Hat, Inc. https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html [No types assigned]
Added
Reference
Red Hat, Inc. https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html [No types assigned]
Added
Reference
Red Hat, Inc. https://news.ycombinator.com/item?id=40843778 [No types assigned]
Added
Reference
Red Hat, Inc. https://security-tracker.debian.org/tracker/CVE-2024-6387 [No types assigned]
Added
Reference
Red Hat, Inc. https://ubuntu.com/security/CVE-2024-6387 [No types assigned]
Added
Reference
Red Hat, Inc. https://ubuntu.com/security/notices/USN-6859-1 [No types assigned]
Added
Reference
Red Hat, Inc. https://www.openssh.com/txt/release-9.8 [No types assigned]
Added
Reference
Red Hat, Inc. https://www.suse.com/security/cve/CVE-2024-6387.html [No types assigned]
Added
Reference
Red Hat, Inc. https://www.theregister.com/2024/07/01/regresshion_openssh/ [No types assigned]
CVE Modified by Red Hat, Inc.7/01/2024 1:15:09 PM
Action
Type
Old Value
New Value
Added
Reference
Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/07/01/12 [No types assigned]
New CVE Received by NIST7/01/2024 9:15:06 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
Red Hat, Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CWE
Red Hat, Inc. CWE-364
Added
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().
Added
Reference
Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2024-6387 [No types assigned]
Added
Reference
Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2294604 [No types assigned]
Added
Reference
Red Hat, Inc. https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt [No types assigned]
Quick Info
CVE Dictionary Entry: CVE-2024-6387 NVD
Published Date: 07/01/2024 NVD
Last Modified: 07/04/2024
Source: Red Hat, Inc.
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