telnetd in Heimdal 0.6.x before 0.6.6 and 0.7.x before 0.7.2 allows remote…
Priority MEDIUM 40Published · 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
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
telnetd in Heimdal 0.6.x before 0.6.6 and 0.7.x before 0.7.2 allows remote unauthenticated attackers to cause a denial of service (server crash) via unknown vectors that trigger a null dereference.
Why it matters now
EPSS 0.03141 87th 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:kth:heimdal:0.6.1:*:*:*:*:*:*:* | 0.6.1 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.6.2:*:*:*:*:*:*:* | 0.6.2 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.6.3:*:*:*:*:*:*:* | 0.6.3 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.6.4:*:*:*:*:*:*:* | 0.6.4 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.6.5:*:*:*:*:*:*:* | 0.6.5 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.7.1:*:*:*:*:*:*:* | 0.7.1 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.7.1.1:*:*:*:*:*:*:* | 0.7.1.1 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.7.1.2:*:*:*:*:*:*:* | 0.7.1.2 | Vulnerable | Kth |
| cpe:2.3:a:kth:heimdal:0.7.1.3:*:*:*:*:*:*:* | 0.7.1.3 | Vulnerable | Kth |
- cpe:2.3:a:kth:heimdal:0.6.1:*:*:*:*:*:*:* Versions 0.6.1 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.6.2:*:*:*:*:*:*:* Versions 0.6.2 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.6.3:*:*:*:*:*:*:* Versions 0.6.3 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.6.4:*:*:*:*:*:*:* Versions 0.6.4 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.6.5:*:*:*:*:*:*:* Versions 0.6.5 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.7.1:*:*:*:*:*:*:* Versions 0.7.1 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.7.1.1:*:*:*:*:*:*:* Versions 0.7.1.1 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.7.1.2:*:*:*:*:*:*:* Versions 0.7.1.2 Vulnerable ·Kth
- cpe:2.3:a:kth:heimdal:0.7.1.3:*:*:*:*:*:*:* Versions 0.7.1.3 Vulnerable ·Kth
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-0677
- 2026-10-03 Alias added: GHSA-5rvx-m258-68cr
References
More Kth Heimdal vulnerabilities
- TI-2002-01181 Multiple buffer overflows in Heimdal before 0.5, possibly in both the (1) kadmind and (2)… CVSS 2.0HIGH 10.0
- TI-2002-01182 Unknown vulnerabilities in Heimdal before 0.5 with unknown impact, possibly in the (1)… CVSS 2.0HIGH 10.0
- TI-2002-00731 Kerberos 5 su (k5su) in FreeBSD 4.4 and earlier relies on the getlogin system call to… CVSS 2.0HIGH 7.2
- TI-2004-00340 Heimdal 0.6.x before 0.6.1 and 0.5.x before 0.5.3 does not properly perform certain… CVSS 2.0MEDIUM 5.0
- TI-2006-00565 Unspecified vulnerability in rshd in Heimdal 0.6.x before 0.6.6 and 0.7.x before 0.7.2… CVSS 2.0LOW 2.1
Sources
- CVE-2006-0677 · CVE Program
- CVE-2006-0677 · NVD
- FIRST EPSS
- GHSA-5rvx-m258-68cr · GitHub Advisory Database · CC BY 4.0
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