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[ GLSA 200707-13 ] Fail2ban: Denial of Service
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GLSA
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Joined: 12 May 2004
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PostPosted: Sat Jul 28, 2007 11:26 pm    Post subject: [ GLSA 200707-13 ] Fail2ban: Denial of Service Reply with quote

Gentoo Linux Security Advisory

Title: Fail2ban: Denial of Service (GLSA 200707-13)
Severity: normal
Exploitable: remote
Date: July 28, 2007
Updated: January 09, 2008
Bug(s): #181214
ID: 200707-13

Synopsis


Fail2ban is vulnerable to a Denial of Service attack.


Background


Fail2ban is a tool for parsing log files and banning IP addresses which
make too many password failures.


Affected Packages

Package: net-analyzer/fail2ban
Vulnerable: < 0.8.0-r1
Unaffected: >= 0.8.0-r1
Architectures: All supported architectures


Description


A vulnerability has been discovered in Fail2ban when parsing log files.


Impact


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.


Workaround


There is no known workaround at this time.


Resolution


All Fail2ban users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.8.0-r1"


References

CVE-2007-4321
Original advisory


Last edited by GLSA on Mon Aug 04, 2014 4:24 am; edited 3 times in total
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