ghsa-2x8c-95vh-gfv4
Vulnerability from github
Published
2024-07-01 15:32
Modified
2024-07-30 03:30
Severity
Details
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().
{
"affected": [],
"aliases": [
"CVE-2024-6387"
],
"database_specific": {
"cwe_ids": [
"CWE-362",
"CWE-364"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-01T13:15:06Z",
"severity": "HIGH"
},
"details": "A signal handler race condition was found in OpenSSH\u0027s server (sshd), where a client does not authenticate within LoginGraceTime seconds (120 by default, 600 in old OpenSSH versions), then sshd\u0027s SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog().",
"id": "GHSA-2x8c-95vh-gfv4",
"modified": "2024-07-30T03:30:51Z",
"published": "2024-07-01T15:32:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6387"
},
{
"type": "WEB",
"url": "https://github.com/rapier1/hpn-ssh/issues/87"
},
{
"type": "WEB",
"url": "https://github.com/oracle/oracle-linux/issues/149"
},
{
"type": "WEB",
"url": "https://github.com/microsoft/azurelinux/issues/9555"
},
{
"type": "WEB",
"url": "https://github.com/PowerShell/Win32-OpenSSH/issues/2249"
},
{
"type": "WEB",
"url": "https://github.com/Azure/AKS/issues/4379"
},
{
"type": "WEB",
"url": "https://github.com/AlmaLinux/updates/issues/629"
},
{
"type": "WEB",
"url": "https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4312"
},
{
"type": "WEB",
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010"
},
{
"type": "WEB",
"url": "https://santandersecurityresearch.github.io/blog/sshing_the_masses.html"
},
{
"type": "WEB",
"url": "https://security-tracker.debian.org/tracker/CVE-2024-6387"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240701-0001"
},
{
"type": "WEB",
"url": "https://sig-security.rocky.page/issues/CVE-2024-6387"
},
{
"type": "WEB",
"url": "https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214118"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214119"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214120"
},
{
"type": "WEB",
"url": "https://ubuntu.com/security/CVE-2024-6387"
},
{
"type": "WEB",
"url": "https://ubuntu.com/security/notices/USN-6859-1"
},
{
"type": "WEB",
"url": "https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do"
},
{
"type": "WEB",
"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100"
},
{
"type": "WEB",
"url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc"
},
{
"type": "WEB",
"url": "https://www.openssh.com/txt/release-9.8"
},
{
"type": "WEB",
"url": "https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt"
},
{
"type": "WEB",
"url": "https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html"
},
{
"type": "WEB",
"url": "https://www.suse.com/security/cve/CVE-2024-6387.html"
},
{
"type": "WEB",
"url": "https://www.theregister.com/2024/07/01/regresshion_openssh"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4340"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4389"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4469"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4474"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4479"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:4484"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2024-6387"
},
{
"type": "WEB",
"url": "https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1"
},
{
"type": "WEB",
"url": "https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux"
},
{
"type": "WEB",
"url": "https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294604"
},
{
"type": "WEB",
"url": "https://explore.alas.aws.amazon.com/CVE-2024-6387.html"
},
{
"type": "WEB",
"url": "https://forum.vmssoftware.com/viewtopic.php?f=8\u0026t=9132"
},
{
"type": "WEB",
"url": "https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc"
},
{
"type": "WEB",
"url": "https://github.com/PowerShell/Win32-OpenSSH/discussions/2248"
},
{
"type": "WEB",
"url": "https://github.com/zgzhang/cve-2024-6387-poc"
},
{
"type": "WEB",
"url": "https://lists.almalinux.org/archives/list/announce@lists.almalinux.org/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY"
},
{
"type": "WEB",
"url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"
},
{
"type": "WEB",
"url": "https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html"
},
{
"type": "WEB",
"url": "https://news.ycombinator.com/item?id=40843778"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Jul/18"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Jul/19"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Jul/20"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/12"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/13"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/02/1"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/1"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/11"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/2"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/4"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/5"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/04/1"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/04/2"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/08/2"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/08/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/09/2"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/09/5"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/1"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/2"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/4"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/6"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/11/1"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/11/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/23/4"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/23/6"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/28/2"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/07/28/3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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