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(Red Hat Issues Fix) vsftpd vsf_filename_passes_filter() Bug Lets Remote Authenticated Users Deny Service
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SecurityTracker Alert ID: 1025187 |
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SecurityTracker URL: http://securitytracker.com/id/1025187
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CVE Reference:
CVE-2011-0762
(Links to External Site)
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Date: Mar 10 2011
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
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Version(s): prior to 2.3.3
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Description:
A vulnerability was reported in vsftpd. A remote authenticated user can cause denial of service conditions.
A remote authenticated user can establish multiple FTP sessions and send specially crafted glob expressions in STAT commands to cause the target service to consume excessive CPU resources.
The original advisory is available at:
http://securityreason.com/achievement_securityalert/95
Maksymilian Arciemowicz of securityreason.com reported this vulnerability.
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Impact:
A remote authenticated user can cause excessive CPU consumption on the target system.
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Solution:
Red Hat has issued a fix.
The Red Hat advisory is available at:
https://rhn.redhat.com/errata/RHSA-2011-0337.html
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Vendor URL: ftp://vsftpd.beasts.org/users/cevans/untar/vsftpd-2.3.4/Changelog (Links to External Site)
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Cause:
State error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 9 Mar 2011 15:11:01 -0700
Subject: [RHSA-2011:0337-01] Important: vsftpd security update
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: vsftpd security update
Advisory ID: RHSA-2011:0337-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-0337.html
Issue date: 2011-03-09
CVE Names: CVE-2011-0762
=====================================================================
1. Summary:
An updated vsftpd package that fixes one security issue is now available
for Red Hat Enterprise Linux 4, 5, and 6.
The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.
2. Relevant releases/architectures:
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
3. Description:
vsftpd (Very Secure File Transfer Protocol (FTP) daemon) is a secure FTP
server for Linux, UNIX, and similar operating systems.
A flaw was discovered in the way vsftpd processed file name patterns. An
FTP user could use this flaw to cause the vsftpd process to use an
excessive amount of CPU time, when processing a request with a
specially-crafted file name pattern. (CVE-2011-0762)
All vsftpd users should upgrade to this updated package, which contains a
backported patch to correct this issue. The vsftpd daemon must be restarted
for this update to take effect.
4. Solution:
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
681667 - CVE-2011-0762 vsftpd: remote DoS via crafted glob pattern
6. Package List:
Red Hat Enterprise Linux AS version 4:
Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/vsftpd-2.0.1-9.el4.src.rpm
i386:
vsftpd-2.0.1-9.el4.i386.rpm
vsftpd-debuginfo-2.0.1-9.el4.i386.rpm
ia64:
vsftpd-2.0.1-9.el4.ia64.rpm
vsftpd-debuginfo-2.0.1-9.el4.ia64.rpm
ppc:
vsftpd-2.0.1-9.el4.ppc.rpm
vsftpd-debuginfo-2.0.1-9.el4.ppc.rpm
s390:
vsftpd-2.0.1-9.el4.s390.rpm
vsftpd-debuginfo-2.0.1-9.el4.s390.rpm
s390x:
vsftpd-2.0.1-9.el4.s390x.rpm
vsftpd-debuginfo-2.0.1-9.el4.s390x.rpm
x86_64:
vsftpd-2.0.1-9.el4.x86_64.rpm
vsftpd-debuginfo-2.0.1-9.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/vsftpd-2.0.1-9.el4.src.rpm
i386:
vsftpd-2.0.1-9.el4.i386.rpm
vsftpd-debuginfo-2.0.1-9.el4.i386.rpm
ia64:
vsftpd-2.0.1-9.el4.ia64.rpm
vsftpd-debuginfo-2.0.1-9.el4.ia64.rpm
x86_64:
vsftpd-2.0.1-9.el4.x86_64.rpm
vsftpd-debuginfo-2.0.1-9.el4.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/vsftpd-2.0.5-16.el5_6.1.src.rpm
i386:
vsftpd-2.0.5-16.el5_6.1.i386.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.i386.rpm
x86_64:
vsftpd-2.0.5-16.el5_6.1.x86_64.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/vsftpd-2.0.5-16.el5_6.1.src.rpm
i386:
vsftpd-2.0.5-16.el5_6.1.i386.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.i386.rpm
ia64:
vsftpd-2.0.5-16.el5_6.1.ia64.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.ia64.rpm
ppc:
vsftpd-2.0.5-16.el5_6.1.ppc.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.ppc.rpm
s390x:
vsftpd-2.0.5-16.el5_6.1.s390x.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.s390x.rpm
x86_64:
vsftpd-2.0.5-16.el5_6.1.x86_64.rpm
vsftpd-debuginfo-2.0.5-16.el5_6.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/vsftpd-2.2.2-6.el6_0.1.src.rpm
i386:
vsftpd-2.2.2-6.el6_0.1.i686.rpm
vsftpd-debuginfo-2.2.2-6.el6_0.1.i686.rpm
ppc64:
vsftpd-2.2.2-6.el6_0.1.ppc64.rpm
vsftpd-debuginfo-2.2.2-6.el6_0.1.ppc64.rpm
s390x:
vsftpd-2.2.2-6.el6_0.1.s390x.rpm
vsftpd-debuginfo-2.2.2-6.el6_0.1.s390x.rpm
x86_64:
vsftpd-2.2.2-6.el6_0.1.x86_64.rpm
vsftpd-debuginfo-2.2.2-6.el6_0.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/vsftpd-2.2.2-6.el6_0.1.src.rpm
i386:
vsftpd-2.2.2-6.el6_0.1.i686.rpm
vsftpd-debuginfo-2.2.2-6.el6_0.1.i686.rpm
x86_64:
vsftpd-2.2.2-6.el6_0.1.x86_64.rpm
vsftpd-debuginfo-2.2.2-6.el6_0.1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2011-0762.html
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2011 Red Hat, Inc.
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