Memory corruption in Cisco UCS C-Series Rack Servers
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
A vulnerability in the TCP throttling process of Cisco UCS C-Series Rack Servers 3.0(0.234) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient rate-limiting protection. An attacker could exploit this vulnerability by sending a high rate of TCP SYN packets to a specific TCP listening port on an affected device. An exploit could allow the attacker to cause a specific TCP listening port to stop accepting new connections, resulting in a DoS condition. Cisco Bug IDs: CSCva65544.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Cisco UCS C-Series Rack Servers | Cisco UCS C-Series Rack Servers | — | No fix listed | CNA |
- Cisco UCS C-Series Rack Servers Vendor— Affected Cisco UCS C-Series Rack Servers Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:unified_computing_system:3.0\(0.234\):*:*:*:*:*:*:* | 3.0(0.234) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ucs_c220_m4_rack_server:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_c240_m4_rack_server:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_c3160_rack_server:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_c460_m4_rack_server:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:a:cisco:unified_computing_system:3.0\(0.234\):*:*:*:*:*:*:* Versions 3.0(0.234) Vulnerable ·Cisco
- cpe:2.3:h:cisco:ucs_c220_m4_rack_server:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_c240_m4_rack_server:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_c3160_rack_server:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_c460_m4_rack_server:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-6633
- 2026-10-03 Alias added: GHSA-g9pg-mx97-6ghh
References
More Cisco Unified Computing System vulnerabilities
- TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
- TI-2015-05417 An unspecified CGI script in Cisco FX-OS before 1.1.2 on Firepower 9000 devices and Cisco… CVSS 3.0CRITICAL 9.8
- TI-2020-08191 IP-in-IP protocol allows a remote, unauthenticated attacker to route arbitrary network traffic CVSS 3.1MEDIUM 5.3
- TI-2018-00390 Cisco Integrated Management Controller Command Injection Vulnerability CVSS 3.0HIGH 8.8
- TI-2018-00389 Cisco Integrated Management Controller Command Injection Vulnerability CVSS 3.0HIGH 8.8
- TI-2021-01114 Cisco NX-OS Software IPv6 Netstack Denial of Service Vulnerability CVSS 3.1HIGH 8.6
Sources
- CVE-2017-6633 · CVE Program
- CVE-2017-6633 · NVD
- FIRST EPSS
- GHSA-g9pg-mx97-6ghh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences