CVE-2024-6387: Openssh: regresshion - race condition in ssh allows rce/dos
Noroxi assessment
Priority: This week (action score 62/100)
- Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 99.5% (FIRST EPSS); higher than 99.9% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: Azure Arc Resource Bridge on Azure Arc-enabled System Center Virtual Machine Manager 1.2.0; Azure Arc Resource Bridge on Azure Arc-enabled VMware vSphere 1.2.0; Azure Arc Resource Bridge on Azure Stack HCI 2408.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Don’t wait for the next maintenance window. Upgrade to Azure Arc Resource Bridge on Azure Arc-enabled System Center Virtual Machine Manager 1.2.0; Azure Arc Resource Bridge on Azure Arc-enabled VMware vSphere 1.2.0; Azure Arc Resource Bridge on Azure Stack HCI 2408 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Jul 1, 2024
- Updated
- Nov 6, 2026
- EPSS
- 99.5% · 99th percentile
- CWE
- CWE-364
Report tools
Action score
62
Don’t wait for the next maintenance window.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 30 / 30 · 99.5%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 8.1
- CNA · redhat
- 8.1
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| sonicwall | sma 6200 firmware | cpe:2.3:o:sonicwall:sma_6200_firmware |
| sonicwall | sma 6200 | cpe:2.3:h:sonicwall:sma_6200 |
| sonicwall | sma 7200 firmware | cpe:2.3:o:sonicwall:sma_7200_firmware |
| sonicwall | sma 7200 | cpe:2.3:h:sonicwall:sma_7200 |
| sonicwall | sma 6210 firmware | cpe:2.3:o:sonicwall:sma_6210_firmware |
| sonicwall | sma 6210 | cpe:2.3:h:sonicwall:sma_6210 |
| sonicwall | sma 7210 firmware | cpe:2.3:o:sonicwall:sma_7210_firmware |
| sonicwall | sma 7210 | cpe:2.3:h:sonicwall:sma_7210 |
| sonicwall | sma 8200v firmware | cpe:2.3:o:sonicwall:sma_8200v_firmware |
| sonicwall | sma 8200v | cpe:2.3:h:sonicwall:sma_8200v |
| sonicwall | sra ex 7000 firmware | cpe:2.3:o:sonicwall:sra_ex_7000_firmware |
| sonicwall | sra ex 7000 | cpe:2.3:h:sonicwall:sra_ex_7000 |
and 69 more
Using sma 6200 firmware? Add it to your stack and be the first to know about CVEs like this one. (VPN gateway)
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Red Hat Red Hat Ceph Storage 5
- all versionsunknown
Red Hat Red Hat Ceph Storage 6
- all versionsunknown
Red Hat Red Hat Ceph Storage 7
- all versionsunknown
Red Hat Red Hat Enterprise Linux 10
- all versionsunknown
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8
- all versionsunknown
Red Hat Red Hat Enterprise Linux 9
- 0:8.7p1-38.el9_4.1 and laternot affected · rpm
- 0:8.7p1-38.el9_4.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- 0:8.7p1-12.el9_0.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
- 0:8.7p1-30.el9_2.4 and laternot affected · rpm
Red Hat Red Hat OpenShift Container Platform 4
- all versionsaffected
Red Hat Red Hat OpenShift Container Platform 4.13
- 413.92.202407091321-0 and laternot affected · rpm
Affected versions · NVD (20)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- almalinux almalinux9.0
- amazon amazon linux2023.0
- apple macos13.0 and later · before 13.6.8
- apple macos14.0 and later · before 14.6
- apple macos12.0 and later · before 12.7.6
- arista eos4.32.0 and later · up to 4.32.1f inclusive
- canonical ubuntu linux22.04
- canonical ubuntu linux22.10
- canonical ubuntu linux23.04
- canonical ubuntu linux23.10
- canonical ubuntu linux24.04
- debian debian linux12.0
- freebsd freebsd13.2
- freebsd freebsd13.3
- freebsd freebsd14.0
- freebsd freebsd14.1
- netapp 500f firmwareall versions
- netapp 8300 firmwareall versions
- netapp 8700 firmwareall versions
- netapp a150 firmwareall versions
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:9 | openssh | before 8.7p1-38.el9_4.1 | 8.7p1-38.el9_4.1 |
| AlmaLinux:9 | openssh-askpass | before 8.7p1-38.el9_4.1 | 8.7p1-38.el9_4.1 |
| AlmaLinux:9 | openssh-clients | before 8.7p1-38.el9_4.1 | 8.7p1-38.el9_4.1 |
| AlmaLinux:9 | openssh-keycat | before 8.7p1-38.el9_4.1 | 8.7p1-38.el9_4.1 |
| AlmaLinux:9 | openssh-server | before 8.7p1-38.el9_4.1 | 8.7p1-38.el9_4.1 |
| AlmaLinux:9 | pam_ssh_agent_auth | before 0.10.4-5.38.el9_4.1 | 0.10.4-5.38.el9_4.1 |
| Alpine:v3.17 | openssh | from 8.6 · before 9.1_p1-r6 | 9.1_p1-r6 |
| Alpine:v3.18 | openssh | from 8.6 · before 9.3_p2-r2 | 9.3_p2-r2 |
| Alpine:v3.19 | openssh | from 8.6 · before 9.6_p1-r1 | 9.6_p1-r1 |
| Alpine:v3.20 | openssh | from 8.6 · before 9.7_p1-r4 | 9.7_p1-r4 |
| Alpine:v3.21 | openssh | from 8.6 · before 9.8_p1-r0 | 9.8_p1-r0 |
| Debian:12 | openssh | before 1:9.2p1-2+deb12u3 | 1:9.2p1-2+deb12u3 |
| Debian:13 | openssh | before 1:9.7p1-7 | 1:9.7p1-7 |
| openSUSE:Leap 15.6 | openssh | before 9.6p1-150600.6.3.1 | 9.6p1-150600.6.3.1 |
| openSUSE:Leap 15.6 | openssh-askpass-gnome | before 9.6p1-150600.6.3.1 | 9.6p1-150600.6.3.1 |
| openSUSE:Tumbleweed | openssh | before 9.6p1-10.1 | 9.6p1-10.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-askpass | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-askpass-debuginfo | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-clients-debuginfo | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-debuginfo | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-debugsource | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-keycat-debuginfo | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-server-debuginfo | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | openssh-sk-dummy-debuginfo | before 0:8.7p1-38.el9_4.1 | 0:8.7p1-38.el9_4.1 |
+36
Same product
sonicwall: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-22282SonicWall SMA1000 series firmware 12.4.0, 12.4.1-02965 and earlier versions incorrectly restricts access to a resource using HTTP…41Plan
- CVE-2022-1701SonicWall SMA1000 series firmware 12.4.0, 12.4.1-02965 and earlier versions uses a shared and hard-coded encryption key to store data.31Monitor
- CVE-2022-1702SonicWall SMA1000 series firmware 12.4.0, 12.4.1-02965 and earlier versions accept a user-controlled input that specifies a link to an…27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Azure Arc Resource Bridge on Azure Arc-enabled System Center Virtual Machine Manager | 1.2.0 · Release Notes | Microsoft (MSRC) |
| Azure Arc Resource Bridge on Azure Arc-enabled VMware vSphere | 1.2.0 · Release Notes | Microsoft (MSRC) |
| Azure Arc Resource Bridge on Azure Stack HCI | 2408 · Release Notes | Microsoft (MSRC) |
| Azure Kubernetes Service Node on Azure Linux | 202407.03.0 · Release Notes | Microsoft (MSRC) |
| Azure Kubernetes Service Node on Ubuntu Linux | 202407.08.0 · Release Notes | Microsoft (MSRC) |
| CBL Mariner 2.0 ARM | 8.9p1-6 · openssh | Microsoft (MSRC) |
| CBL Mariner 2.0 x64 | 8.9p1-6 · openssh | Microsoft (MSRC) |
| almalinux:openssh | 8.7p1-38.el9_4.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssh-askpass | 8.7p1-38.el9_4.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssh-clients | 8.7p1-38.el9_4.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssh-keycat | 8.7p1-38.el9_4.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssh-server | 8.7p1-38.el9_4.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:pam_ssh_agent_auth | 0.10.4-5.38.el9_4.1 · AlmaLinux:9 | Package registry (OSV) |
| alpine:openssh | 9.1_p1-r6 · Alpine:v3.17 | Package registry (OSV) |
| debian:openssh | 1:9.2p1-2+deb12u3 · Debian:12 | Package registry (OSV) |
| opensuse:openssh | 9.6p1-150600.6.3.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:openssh-askpass-gnome | 9.6p1-150600.6.3.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:openssh | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::baseos | Package registry (OSV) |
| red hat:openssh-askpass | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-askpass-debuginfo | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-clients | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::baseos | Package registry (OSV) |
| red hat:openssh-clients-debuginfo | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-debuginfo | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-debugsource | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-keycat-debuginfo | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-server-debuginfo | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssh-sk-dummy-debuginfo | 0:8.7p1-38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:pam_ssh_agent_auth | 0:0.10.4-5.38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:pam_ssh_agent_auth-debuginfo | 0:0.10.4-5.38.el9_4.1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| suse:openssh | 9.6p1-150600.6.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | Package registry (OSV) |
+1
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
- Proof-of-concept repository on GitHub ×50
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | 50 repositories | 2024-07-01 → 2024-07-03 |
| Exploit-DB entry | remote | 2025-04-22 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-1 d
- Published
- TodayNov 14, 2026+866 d
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-24-0846 · Jul 2, 2024(OpenSSH Güvenlik Bildirimi)
Not on record for this CVE: EPSS history · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-364 · Signal Handler Race ConditionCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- access.redhat.com/errata/RHSA-2024:4340
- access.redhat.com/errata/RHSA-2024:4389
- access.redhat.com/errata/RHSA-2024:4469
- access.redhat.com/errata/RHSA-2024:4474
- access.redhat.com/errata/RHSA-2024:4479
- access.redhat.com/errata/RHSA-2024:4484
- access.redhat.com/security/cve/CVE-2024-6387
- bugzilla.redhat.com/show_bug.cgi?id=2294604
- www.openssh.com/txt/release-9.8
- seclists.org/fulldisclosure/2024/Jul/18
- seclists.org/fulldisclosure/2024/Jul/19
- seclists.org/fulldisclosure/2024/Jul/20
- www.openwall.com/lists/oss-security/2024/07/01/12
- www.openwall.com/lists/oss-security/2024/07/01/13
- www.openwall.com/lists/oss-security/2024/07/02/1
- www.openwall.com/lists/oss-security/2024/07/03/1
- www.openwall.com/lists/oss-security/2024/07/03/2
- www.openwall.com/lists/oss-security/2024/07/03/3
- www.openwall.com/lists/oss-security/2024/07/03/4
Vendor advisories and official records. Exploit/PoC links are deliberately left out.