medium
5
CWE
189 190
Advisory Published
CVE Published
Updated

CVE-2011-1137: Integer Overflow

First published: Thu Mar 03 2011(Updated: )

An integer overflow flaw was reported [1],[2] in the mod_sftp module of ProFTPD. If a specially crafted SSH message was sent to a ProFTPD server using mod_sftp, it could lead to the allocation of enormous amounts of memory and an eventual OOM termination by the kernel. This issue was assigned the name <a href="https://access.redhat.com/security/cve/CVE-2011-1137">CVE-2011-1137</a> [3]. It was fixed in CVS [4],[5],[6] References: [1] <a href="http://bugs.proftpd.org/show_bug.cgi?id=3586">http://bugs.proftpd.org/show_bug.cgi?id=3586</a> [2] <a href="http://www.exploit-db.com/exploits/16129/">http://www.exploit-db.com/exploits/16129/</a> [3] <a href="http://www.openwall.com/lists/oss-security/2011/03/02/5">http://www.openwall.com/lists/oss-security/2011/03/02/5</a> [4] <a href="http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/packet.c?r1=1.14.2.2&amp;r2=1.14.2.3">http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/packet.c?r1=1.14.2.2&amp;r2=1.14.2.3</a> [5] <a href="http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/packet.h?r1=1.3&amp;r2=1.3.2.1">http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/packet.h?r1=1.3&amp;r2=1.3.2.1</a> [6] <a href="http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/mod_sftp.c?r1=1.29.2.1&amp;r2=1.29.2.2">http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/mod_sftp.c?r1=1.29.2.1&amp;r2=1.29.2.2</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
ProFTPD<=1.3.3
ProFTPD=1.2.0
ProFTPD=1.2.0-pre10
ProFTPD=1.2.0-pre9
ProFTPD=1.2.0-rc1
ProFTPD=1.2.0-rc2
ProFTPD=1.2.0-rc3
ProFTPD=1.2.1
ProFTPD=1.2.2
ProFTPD=1.2.2-rc1
ProFTPD=1.2.2-rc2
ProFTPD=1.2.2-rc3
ProFTPD=1.2.3
ProFTPD=1.2.4
ProFTPD=1.2.5
ProFTPD=1.2.5-rc1
ProFTPD=1.2.5-rc2
ProFTPD=1.2.5-rc3
ProFTPD=1.2.6
ProFTPD=1.2.6-rc1
ProFTPD=1.2.6-rc2
ProFTPD=1.2.7
ProFTPD=1.2.7-rc1
ProFTPD=1.2.7-rc2
ProFTPD=1.2.7-rc3
ProFTPD=1.2.8
ProFTPD=1.2.8-rc1
ProFTPD=1.2.8-rc2
ProFTPD=1.2.9
ProFTPD=1.2.9-rc1
ProFTPD=1.2.9-rc2
ProFTPD=1.2.9-rc3
ProFTPD=1.2.10
ProFTPD=1.2.10-rc1
ProFTPD=1.2.10-rc2
ProFTPD=1.2.10-rc3
ProFTPD=1.3.0
ProFTPD=1.3.0-a
ProFTPD=1.3.0-rc1
ProFTPD=1.3.0-rc2
ProFTPD=1.3.0-rc3
ProFTPD=1.3.0-rc4
ProFTPD=1.3.0-rc5
ProFTPD=1.3.1
ProFTPD=1.3.1-rc1
ProFTPD=1.3.1-rc2
ProFTPD=1.3.1-rc3
ProFTPD=1.3.2
ProFTPD=1.3.2-a
ProFTPD=1.3.2-b
ProFTPD=1.3.2-c
ProFTPD=1.3.2-d
ProFTPD=1.3.2-e
ProFTPD=1.3.2-rc1
ProFTPD=1.3.2-rc2
ProFTPD=1.3.2-rc3
ProFTPD=1.3.2-rc4
ProFTPD=1.3.3
ProFTPD=1.3.3-a
ProFTPD=1.3.3-b
ProFTPD=1.3.3-c
ProFTPD=1.3.3-rc1
ProFTPD=1.3.3-rc2
ProFTPD=1.3.3-rc3
ProFTPD=1.3.3-rc4

Remedy

http://bugs.proftpd.org/show_bug.cgi?id=3586

Remedy

http://proftp.cvs.sourceforge.net/viewvc/proftp/proftpd/contrib/mod_sftp/mod_sftp.c?r1=1.29.2.1&r2=1.29.2.2

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=681718

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-1137?

    CVE-2011-1137 is classified as a high severity vulnerability due to its potential to cause an out-of-memory (OOM) termination in affected ProFTPD servers.

  • How do I fix CVE-2011-1137?

    To fix CVE-2011-1137, you should upgrade to a version of ProFTPD that is newer than 1.3.3 or any available patch provided by the vendor.

  • What versions of ProFTPD are affected by CVE-2011-1137?

    CVE-2011-1137 affects ProFTPD versions up to and including 1.3.3, as well as specific earlier versions such as 1.2.0 through 1.2.10.

  • What impact can CVE-2011-1137 have on a ProFTPD server?

    If exploited, CVE-2011-1137 can lead to the server consuming excessive memory, potentially resulting in a denial-of-service condition.

  • Is CVE-2011-1137 exploitable remotely?

    Yes, CVE-2011-1137 is remotely exploitable through specially crafted SSH messages sent to a vulnerable ProFTPD server.

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