CVE-2006-6301 json
DenyHosts 2.5 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and…
published 2006-12-06 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6284
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.9%
- EPSS 1.9% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
DenyHosts 2.5 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a login name containing certain strings with an IP address, which is not properly handled by a regular expression.
Exploit prediction
1.89% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- bugs.gentoo.org http://bugs.gentoo.org/show_bug.cgi?id=157163 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
References
-
bugs.gentoo.org
/show_bug.cgi?id=157163
exploit
-
security.gentoo.org
/glsa/glsa-200701-01.xml
vendor-advisory
-
secunia.com
/advisories/23236
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/23603
third-party-advisory, vendor-advisory
-
vupen.com
/english/advisories/2006/4876
vdb-entry
-
exchange.xforce.ibmcloud.com
/vulnerabilities/30761
vdb-entry
-
securityfocus.com
/bid/21468
vdb-entry
Sources
- CVE List CVE-2006-6301
- NVD CVE-2006-6301
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.