PatchTheCVECVE-2006-6679: Pedro Lineu Orso chetcpasswd before 2.4 relies on the X-Forwarded-For HTTP header when verifying a client's st
CVE-2006-6679 is a high-severity flaw (CVSS 7.5) affecting chetcpasswd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Pedro Lineu Orso chetcpasswd before 2.4 relies on the X-Forwarded-For HTTP header when verifying a client's status on an IP address ACL, which allows remote attackers to gain unauthorized access by spoofing this header.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.1% (top 18%) |
| CISA exploited list | No |
| Weakness | CWE-863 |
| Published | 2006-12-21 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2006-6679?
chetcpasswd: upgrade to 2.4. Exact commands for each OS are on this page.
Is CVE-2006-6679 being exploited?
CVE-2006-6679 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2006-6679 affect?
CVE-2006-6679 affects chetcpasswd. Severity is high (CVSS 7.5). Pedro Lineu Orso chetcpasswd before 2.4 relies on the X-Forwarded-For HTTP header when verifying a client's status on an IP address ACL, which allows remote attackers to gain unauthorized access by spoofing this header.
How urgent is CVE-2006-6679?
Priority 52/100. High severity; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2006-6685 HIGH 7.2 DOWNGRADE Heap-based buffer overflow in Pedro Lineu Orso chetcpasswd 2.3.3 allows local users to cause a denial of servi
- CVE-2006-6684 HIGH 7.5 UPGRADE Heap-based buffer overflow in Pedro Lineu Orso chetcpasswd before 2.4 allows remote attackers to cause a denia
- CVE-2006-6683 HIGH 7.8 UPGRADE Pedro Lineu Orso chetcpasswd 2.4.1 and earlier verifies and updates user accounts via custom code that process
- CVE-2006-6682 MEDIUM 5.0 DOWNGRADE Pedro Lineu Orso chetcpasswd 2.3.3 provides a different error message when a request with a valid username fai
- CVE-2006-6681 HIGH 7.5 DOWNGRADE Pedro Lineu Orso chetcpasswd 2.3.3 does not have a rate limit for client requests, which might allow remote at