Description
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.
Metrics
CVSS 2.0 5.0/10
AV:N/AC:L/Au:N/C:N/I:N/A:PAffected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://bugs.gentoo.org/show_bug.cgi?id=157163Exploit
- http://secunia.com/advisories/23236Vendor Advisory
- http://secunia.com/advisories/23603Vendor Advisory
- http://security.gentoo.org/glsa/glsa-200701-01.xml
- http://www.securityfocus.com/bid/21468
- http://www.vupen.com/english/advisories/2006/4876
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30761
- http://bugs.gentoo.org/show_bug.cgi?id=157163Exploit
- http://secunia.com/advisories/23236Vendor Advisory
- http://secunia.com/advisories/23603Vendor Advisory
- http://security.gentoo.org/glsa/glsa-200701-01.xml
- http://www.securityfocus.com/bid/21468
- http://www.vupen.com/english/advisories/2006/4876
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30761
Timeline
- Published
- Dec 6, 2006
- Last modified
- Jun 16, 2026
- NVD status
- Modified