Synopsis

Low: vsftpd security and bug fix update

Type/Severity

Security Advisory: Low

Topic

An updated vsftpd package that fixes a security issue and several bugs is
now available for Red Hat Enterprise Linux 5.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

Description

The vsftpd package includes a Very Secure File Transfer Protocol (FTP)
daemon.

A memory leak was discovered in the vsftpd daemon. An attacker who is able
to connect to an FTP service, either as an authenticated or anonymous user,
could cause vsftpd to allocate all available memory if the "deny_file"
option was enabled in vsftpd.conf. (CVE-2007-5962)

As well, this updated package fixes following bugs:

• a race condition could occur even when the "lock_upload_files" option is
  set. When uploading two files simultaneously, the result was a combination
  of the two files. This resulted in uploaded files becoming corrupted. In
  these updated packages, uploading two files simultaneously will result in a
  file that is identical to the last uploaded file.
  
• when the "userlist_enable" option is used, failed log in attempts as a
  result of the user not being in the list of allowed users, or being in the
  list of denied users, will not be logged. In these updated packages, a new
  "userlist_log=YES" option can be configured in vsftpd.conf, which will log
  failed log in attempts in these situations.
  
• vsftpd did not support usernames that started with an underscore or a
  period character. Usernames starting with an underscore or a period are
  supported in these updated packages.
  
• using wildcards in conjunction with the "ls" command did not return all
  the file names it should. For example, if you FTPed into a directory
  containing three files -- A1, A21 and A11 -- and ran the "ls *1" command,
  only the file names A1 and A21 were returned. These updated packages use
  greedier code that continues to speculatively scan for items even after
  matches have been found.
  
• when the "user_config_dir" option is enabled in vsftpd.conf, and the
  user-specific configuration file did not exist, the following error
  occurred after a user entered their password during the log in process:
  

500 OOPS: reading non-root config file

This has been resolved in this updated package.

All vsftpd users are advised to upgrade to this updated package, which
resolves these issues.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 240553 - vsftpd has a create/lock race condition which corrupts uploads
• BZ - 392181 - vsftpd file listing issue with wildcard
• BZ - 392231 - Uploaded file corrupted when two connections from same client uploading same file simultaneously
• BZ - 397011 - CVE-2007-5962 vsftpd: memory leak when deny_file option is set
• BZ - 400921 - OOPS: reading non-root config file

CVEs

• CVE-2007-5962

References

• http://www.redhat.com/security/updates/classification/#low

Red Hat Enterprise Linux Server 5

SRPM
vsftpd-2.0.5-12.el5.src.rpm	SHA-256: e42cae52a6138c0bedb33bfd5fbc2432a95d38abbc95c2467e5a1a8c9750aa8a
x86_64
vsftpd-2.0.5-12.el5.x86_64.rpm	SHA-256: 0aed5ccfb5d8f4ddb8e650a87d4aa85826df6e5aea532e26a01145b8c348868e
ia64
vsftpd-2.0.5-12.el5.ia64.rpm	SHA-256: 4ff6e72268e8802676136a8a3d88fe97c797c0952ef214bfb8e921445e63c9c1
i386
vsftpd-2.0.5-12.el5.i386.rpm	SHA-256: 1b44e89cc85067627685c8f27e622dca1e955dc6ce21768a1a3458f4b22727b6

Red Hat Enterprise Linux Workstation 5

SRPM
vsftpd-2.0.5-12.el5.src.rpm	SHA-256: e42cae52a6138c0bedb33bfd5fbc2432a95d38abbc95c2467e5a1a8c9750aa8a
x86_64
vsftpd-2.0.5-12.el5.x86_64.rpm	SHA-256: 0aed5ccfb5d8f4ddb8e650a87d4aa85826df6e5aea532e26a01145b8c348868e
i386
vsftpd-2.0.5-12.el5.i386.rpm	SHA-256: 1b44e89cc85067627685c8f27e622dca1e955dc6ce21768a1a3458f4b22727b6

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
vsftpd-2.0.5-12.el5.src.rpm	SHA-256: e42cae52a6138c0bedb33bfd5fbc2432a95d38abbc95c2467e5a1a8c9750aa8a
s390x
vsftpd-2.0.5-12.el5.s390x.rpm	SHA-256: 8651b04b1ed513c839a002b08d4ee263475937f7067df5089ed7826c0dfcd08f

Red Hat Enterprise Linux for Power, big endian 5

SRPM
vsftpd-2.0.5-12.el5.src.rpm	SHA-256: e42cae52a6138c0bedb33bfd5fbc2432a95d38abbc95c2467e5a1a8c9750aa8a
ppc
vsftpd-2.0.5-12.el5.ppc.rpm	SHA-256: 5ba747aae4cb7353e6ce8a70e5ccf0204d94ad9b1149f16737c5381e9c5c0bff

Red Hat Enterprise Linux Server from RHUI 5

SRPM
vsftpd-2.0.5-12.el5.src.rpm	SHA-256: e42cae52a6138c0bedb33bfd5fbc2432a95d38abbc95c2467e5a1a8c9750aa8a
x86_64
vsftpd-2.0.5-12.el5.x86_64.rpm	SHA-256: 0aed5ccfb5d8f4ddb8e650a87d4aa85826df6e5aea532e26a01145b8c348868e
i386
vsftpd-2.0.5-12.el5.i386.rpm	SHA-256: 1b44e89cc85067627685c8f27e622dca1e955dc6ce21768a1a3458f4b22727b6