Fail2ban log message denial of service
| fail2ban-log-message-dos (30739) |  Medium Risk |
Description:
Fail2ban is vulnerable to a denial of service caused by improper parsing of log messages. A remote attacker could exploit this vulnerability to deny access to certain IP addresses by adding arbitrary hosts to the block list.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 200702-05 for patch, upgrade, or suggested workaround information. See References.
References:
- Gentoo Bugzilla Bug 157166: net-analyzer/fail2ban: remote denial of service (CVE-2006-6302).
- SourceForge.net: Fail2Ban.
- BID-21469: Fail2Ban Remote Denial of Service Vulnerability
- CVE-2006-6302: fail2ban 0.7.4 and earlier 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.
- GLSA-200702-05: Fail2ban: Denial of Service
- SA23237: Fail2ban Denial of Service Vulnerability
- VUPEN/ADV-2006-4877: Fail2ban Log Messages Parsing Block List Manipulation Denial of Service Vulnerability
Platforms Affected:
- Fail2ban Fail2ban 0.6.1 and prior
- Fail2ban Fail2ban 0.7.4 and prior
- Gentoo Linux
Reported:
Dec 04, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.