1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200707-13 / fail2ban |
| Release Date | July 28, 2007 |
| Latest Revision | January 09, 2008: 02 |
| Impact | normal |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| net-analyzer/fail2ban | < 0.8.0-r1 | >= 0.8.0-r1 | All supported architectures |
Related bugreports: #181214
Fail2ban is vulnerable to a Denial of Service attack.
Fail2ban is a tool for parsing log files and banning IP addresses which make too many password failures.
A vulnerability has been discovered in Fail2ban when parsing log files.
A remote attacker could send specially crafted SSH login banners to the vulnerable host, which would prevent any ssh connection to the host and result in a Denial of Service.
There is no known workaround at this time.
All Fail2ban users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.8.0-r1" |