ProFTPD contains a flaw that may allow a remote denial of service. The issue is triggered when the 'mod_sftp' module fails to restrict the maximum payload size of SSH packets, which may be exploited via crafted SSH packets sent to the server to cause a denial of service.

Currently, there are no known workarounds or upgrades to correct this issue. However, ProFTPD has released a patch to address this vulnerability.

• Exploit Database: 16129
• CVE ID: 2011-1137 (see also: NVD)
• Secunia Advisory ID: 43234 43635 43978 44240
• Bugtraq ID: 46183
• VUPEN Advisory: ADV-2011-0617 ADV-2011-0857
• Vendor Specific News/Changelog Entry: http://bugs.proftpd.org/show_bug.cgi?id=3586
  http://bugs.proftpd.org/show_bug.cgi?id=3587
  http://lists.debian.org/debian-security-announce/2011/msg00052.html
  http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058344.html
  http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058356.html
  http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/mod_sftp.c?r1=1.29.2.1&r2=1.29.2.2
  http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/packet.c?r1=1.14.2.2&r2=1.14.2.3
  http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/packet.h?r1=1.3&r2=1.3.2.1
  https://bugzilla.redhat.com/show_bug.cgi?id=681718
• Vendor Specific Advisory URL: http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.485806
• Other Advisory URL: http://www.debian.org/security/2011/dsa-2185

• Not Available