xinetd 2.1.8.x does not properly restrict connections if hostnames are used for access…
Priority LOW 37Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
xinetd 2.1.8.x does not properly restrict connections if hostnames are used for access control and the connecting host does not have a reverse DNS entry.
Why it matters now
EPSS 0.02139 82nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:xinetd:xinetd:2.1.87:*:*:*:*:*:*:* | 2.1.87 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.88:*:*:*:*:*:*:* | 2.1.88 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.88_pre1:*:*:*:*:*:*:* | 2.1.88_pre1 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.88_pre2:*:*:*:*:*:*:* | 2.1.88_pre2 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.89_pre1:*:*:*:*:*:*:* | 2.1.89_pre1 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.89_pre2:*:*:*:*:*:*:* | 2.1.89_pre2 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.89_pre3:*:*:*:*:*:*:* | 2.1.89_pre3 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.89_pre4:*:*:*:*:*:*:* | 2.1.89_pre4 | Vulnerable | Xinetd |
| cpe:2.3:a:xinetd:xinetd:2.1.89_pre5:*:*:*:*:*:*:* | 2.1.89_pre5 | Vulnerable | Xinetd |
- cpe:2.3:a:xinetd:xinetd:2.1.87:*:*:*:*:*:*:* Versions 2.1.87 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.88:*:*:*:*:*:*:* Versions 2.1.88 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.88_pre1:*:*:*:*:*:*:* Versions 2.1.88_pre1 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.88_pre2:*:*:*:*:*:*:* Versions 2.1.88_pre2 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.89_pre1:*:*:*:*:*:*:* Versions 2.1.89_pre1 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.89_pre2:*:*:*:*:*:*:* Versions 2.1.89_pre2 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.89_pre3:*:*:*:*:*:*:* Versions 2.1.89_pre3 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.89_pre4:*:*:*:*:*:*:* Versions 2.1.89_pre4 Vulnerable ·Xinetd
- cpe:2.3:a:xinetd:xinetd:2.1.89_pre5:*:*:*:*:*:*:* Versions 2.1.89_pre5 Vulnerable ·Xinetd
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2000-0536
- 2026-10-03 Alias added: GHSA-c22c-879v-fc62
References
More Xinetd vulnerabilities
- TI-2001-00788 Buffer overflow in internal string handling routines of xinetd before 2.1.8.8 allows… CVSS 2.0HIGH 10.0
- TI-2013-03803 xinetd does not enforce the user and group configuration directives for TCPMUX services… CVSS 2.0HIGH 7.6
- TI-2001-01341 Multiple vulnerabilities in xinetd 2.3.0 and earlier, and additional variants until… CVSS 2.0HIGH 7.5
- TI-2003-00195 Memory leak in xinetd 2.3.10 allows remote attackers to cause a denial of service (memory… CVSS 2.0MEDIUM 5.0
- TI-2012-00797 builtins.c in Xinetd before 2.3.15 does not check the service type when the tcpmux-server… CVSS 2.0MEDIUM 4.3
- TI-2001-01275 xinetd 2.1.8 and earlier runs with a default umask of 0, which could allow local users to… CVSS 2.0LOW 3.6
Sources
- CVE-2000-0536 · CVE Program
- CVE-2000-0536 · NVD
- FIRST EPSS
- GHSA-c22c-879v-fc62 · GitHub Advisory Database · CC BY 4.0
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