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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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.