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Red Hat: RHSA-2011:0337-01 Important: vsftpd DoS Threat

red hat
Calendar Grey March 9, 2011
Dist Redhat Esm H88
A significant security patch from Red Hat for vsftpd tackles a DoS exploit flaw affecting versions 4, 5, and 6.
An updated vsftpd package that fixes one security issue is now available for Red Hat Enterprise Linux 4, 5, and 6

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

Summary

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.

Topics%20covered

Topics Covered

security advisory security update DoS Red Hat Enterprise Linux important file transfer vsftpd

References

https://access.redhat.com/security/cve/CVE-2011-0762 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AS version 4:
Source:
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:
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:
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:
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:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:0337-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0337.html
Issue date: 2011-03-09

Topic

An updated vsftpd package that fixes one security issue is now availablefor Red Hat Enterprise Linux 4, 5, and 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory security update DoS Red Hat Enterprise Linux important file transfer vsftpd

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

Bugs Fixed

681667 - CVE-2011-0762 vsftpd: remote DoS via crafted glob pattern

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