Race Condition The advisory has been revoked - it doesn't affect any version of package openssh-askpass (opens in a new tab)
Threat Intelligence
Social Trends
This vulnerability is trending on Twitter; this may indicate a growing threat.
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
EPSS
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
99.51% (100th percentile)
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-CENTOS10-OPENSSHASKPASS-11438191
- published5 Aug 2025
- disclosed1 Jul 2024
Introduced: 1 Jul 2024
CVE-2024-6387 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
Amendment
The Centos security team deemed this advisory irrelevant for Centos:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssh-askpass package and not the openssh-askpass package as distributed by Centos.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2294604
- https://access.redhat.com/security/cve/CVE-2024-6387
- http://seclists.org/fulldisclosure/2024/Jul/18
- http://seclists.org/fulldisclosure/2024/Jul/19
- http://seclists.org/fulldisclosure/2024/Jul/20
- http://www.openwall.com/lists/oss-security/2024/07/01/12
- http://www.openwall.com/lists/oss-security/2024/07/01/13
- http://www.openwall.com/lists/oss-security/2024/07/02/1
- http://www.openwall.com/lists/oss-security/2024/07/03/1
- http://www.openwall.com/lists/oss-security/2024/07/03/11
- http://www.openwall.com/lists/oss-security/2024/07/03/2
- http://www.openwall.com/lists/oss-security/2024/07/03/3
- http://www.openwall.com/lists/oss-security/2024/07/03/4
- http://www.openwall.com/lists/oss-security/2024/07/03/5
- http://www.openwall.com/lists/oss-security/2024/07/04/1
- http://www.openwall.com/lists/oss-security/2024/07/04/2
- http://www.openwall.com/lists/oss-security/2024/07/08/2
- http://www.openwall.com/lists/oss-security/2024/07/08/3
- http://www.openwall.com/lists/oss-security/2024/07/09/2
- http://www.openwall.com/lists/oss-security/2024/07/09/5
- http://www.openwall.com/lists/oss-security/2024/07/10/1
- http://www.openwall.com/lists/oss-security/2024/07/10/2
- http://www.openwall.com/lists/oss-security/2024/07/10/3
- http://www.openwall.com/lists/oss-security/2024/07/10/4
- http://www.openwall.com/lists/oss-security/2024/07/10/6
- http://www.openwall.com/lists/oss-security/2024/07/11/1
- http://www.openwall.com/lists/oss-security/2024/07/11/3
- http://www.openwall.com/lists/oss-security/2024/07/23/4
- http://www.openwall.com/lists/oss-security/2024/07/23/6
- http://www.openwall.com/lists/oss-security/2024/07/28/2
- http://www.openwall.com/lists/oss-security/2024/07/28/3
- https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/
- https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/
- https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server
- https://explore.alas.aws.amazon.com/CVE-2024-6387.html
- https://forum.vmssoftware.com/viewtopic.php?f=8&t=9132
- https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc
- https://github.com/AlmaLinux/updates/issues/629
- https://github.com/Azure/AKS/issues/4379
- https://github.com/PowerShell/Win32-OpenSSH/discussions/2248
- https://github.com/PowerShell/Win32-OpenSSH/issues/2249
- https://github.com/microsoft/azurelinux/issues/9555
- https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09
- https://github.com/oracle/oracle-linux/issues/149
- https://github.com/rapier1/hpn-ssh/issues/87
- https://github.com/zgzhang/cve-2024-6387-poc
- https://lists.almalinux.org/archives/list/announce@lists.almalinux.org/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY/
- https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html
- https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html
- https://news.ycombinator.com/item?id=40843778
- https://packetstorm.news/files/id/190587/
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010
- https://security-tracker.debian.org/tracker/CVE-2024-6387
- https://security.netapp.com/advisory/ntap-20240701-0001/
- https://sig-security.rocky.page/issues/CVE-2024-6387/
- https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/
- https://support.apple.com/kb/HT214118
- https://support.apple.com/kb/HT214119
- https://support.apple.com/kb/HT214120
- https://ubuntu.com/security/CVE-2024-6387
- https://ubuntu.com/security/notices/USN-6859-1
- https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do
- https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100
- https://www.exploit-db.com/exploits/52269
- https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc
- https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html
- https://www.suse.com/security/cve/CVE-2024-6387.html
- https://www.theregister.com/2024/07/01/regresshion_openssh/
- https://www.vicarius.io/vsociety/posts/regresshion-an-openssh-regression-error-cve-2024-6387
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-446545.html
- https://access.redhat.com/errata/RHSA-2024:4312
- https://access.redhat.com/errata/RHSA-2024:4340
- https://access.redhat.com/errata/RHSA-2024:4389
- https://access.redhat.com/errata/RHSA-2024:4469
- https://access.redhat.com/errata/RHSA-2024:4474
- https://access.redhat.com/errata/RHSA-2024:4479
- https://access.redhat.com/errata/RHSA-2024:4484
- https://santandersecurityresearch.github.io/blog/sshing_the_masses.html
- https://www.openssh.com/txt/release-9.8
- https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt
- https://github.com/P4x1s/CVE-2024-6387