Openssh: regresshion - race condition in ssh allows rce/dos
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
- Sep 1, 2026
- EPSS
- 99.5% · 100th percentile
- CWE
- CWE-364
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Report tools
Action score
62
This week
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.
Affected systems
| 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)
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- sonicwall sma 6200 firmwareall versions
- sonicwall sma 6210 firmwareall versions
- sonicwall sma 7200 firmwareall versions
- sonicwall sma 7210 firmwareall versions
- sonicwall sma 8200v firmwareall versions
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
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: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 |
| Red Hat:enterprise_linux:9::appstream | pam_ssh_agent_auth | before 0:0.10.4-5.38.el9_4.1 | 0:0.10.4-5.38.el9_4.1 |
| Red Hat:enterprise_linux:9::appstream | pam_ssh_agent_auth-debuginfo | before 0:0.10.4-5.38.el9_4.1 | 0:0.10.4-5.38.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 connection41Plan
- 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 exter27Monitor
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 |
|---|---|---|
| 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) |
| SUSE:openssh-askpass-gnome | 9.6p1-150600.6.3.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 | Package registry (OSV) |
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 |
|---|---|---|
| Exploit-DB entry | remote | 2025-04-22 |
| Proof-of-concept repository on GitHub | stars:1 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:497 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:378 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:128 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:24 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:1 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:527 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:35 | 2024-07-01 |
| Proof-of-concept repository on GitHub | stars:6 | 2024-07-01 |
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 PoCsame day
- Published
- TodaySep 29, 2026+821 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2024:4312
- 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.