Synopsis

Important: autofs security update

Type/Severity

Security Advisory: Important

Topic

Updated autofs packages are now available to fix a security flaw for Red
Hat Enterprise Linux 5.

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

Description

The autofs utility controls the operation of the automount daemon, which
automatically mounts and unmounts file systems after a period of
inactivity.

There was a security issue with the default installed configuration of
autofs version 5 whereby the entry for the "hosts" map did not specify the
"nosuid" mount option. A local user with control of a remote nfs server
could create a setuid root executable within an exported filesystem on the
remote nfs server that, if mounted using the default hosts map, would allow
the user to gain root privileges. (CVE-2007-5964)

Due to the fact that autofs always mounted hosts map entries suid by
default, autofs has now been altered to always use the "nosuid" option when
mounting from the default hosts map. The "suid" option must be explicitly
given in the master map entry to revert to the old behavior. This change
affects only the hosts map which corresponds to the /net entry in the
default configuration.

Users are advised to upgrade to these updated autofs packages, which
resolve this issue.

Red Hat would like to thank Josh Lange for reporting this issue.

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 Server - Extended Update Support 5.1 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support 5.1 ia64
• Red Hat Enterprise Linux Server - Extended Update Support 5.1 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.1 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.1 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 410031 - CVE-2007-5964 autofs defaults don't restrict suid in /net

CVEs

• CVE-2007-5964

References

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

Red Hat Enterprise Linux Server 5

SRPM
autofs-5.0.1-0.rc2.55.el5.1.src.rpm	SHA-256: c4ead2c0d4e0291f6db17fc5d9e1d3079f43f4a355436be22e41097aabf0352e
x86_64
autofs-5.0.1-0.rc2.55.el5.1.x86_64.rpm	SHA-256: 92b4e9923846913ae8f90a6e756e950c04318d6c9f97d3c76b48666679ce7e3e
ia64
autofs-5.0.1-0.rc2.55.el5.1.ia64.rpm	SHA-256: f777cd1e0a8995ec598bef847903811804b18376076888216ce3fd284eeb6cd7
i386
autofs-5.0.1-0.rc2.55.el5.1.i386.rpm	SHA-256: 830204018a092938a38dbadb223c557e15875e638c4b0d8073749cb71552bc94

Red Hat Enterprise Linux Workstation 5

SRPM
autofs-5.0.1-0.rc2.55.el5.1.src.rpm	SHA-256: c4ead2c0d4e0291f6db17fc5d9e1d3079f43f4a355436be22e41097aabf0352e
x86_64
autofs-5.0.1-0.rc2.55.el5.1.x86_64.rpm	SHA-256: 92b4e9923846913ae8f90a6e756e950c04318d6c9f97d3c76b48666679ce7e3e
i386
autofs-5.0.1-0.rc2.55.el5.1.i386.rpm	SHA-256: 830204018a092938a38dbadb223c557e15875e638c4b0d8073749cb71552bc94

Red Hat Enterprise Linux Desktop 5

SRPM
autofs-5.0.1-0.rc2.55.el5.1.src.rpm	SHA-256: c4ead2c0d4e0291f6db17fc5d9e1d3079f43f4a355436be22e41097aabf0352e
x86_64
autofs-5.0.1-0.rc2.55.el5.1.x86_64.rpm	SHA-256: 92b4e9923846913ae8f90a6e756e950c04318d6c9f97d3c76b48666679ce7e3e
i386
autofs-5.0.1-0.rc2.55.el5.1.i386.rpm	SHA-256: 830204018a092938a38dbadb223c557e15875e638c4b0d8073749cb71552bc94

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
autofs-5.0.1-0.rc2.55.el5.1.src.rpm	SHA-256: c4ead2c0d4e0291f6db17fc5d9e1d3079f43f4a355436be22e41097aabf0352e
s390x
autofs-5.0.1-0.rc2.55.el5.1.s390x.rpm	SHA-256: 962f2d85631c7130a5e1676dd4ccf3ee525c339c95e7c8f689780cfb71343af6

Red Hat Enterprise Linux for Power, big endian 5

SRPM
autofs-5.0.1-0.rc2.55.el5.1.src.rpm	SHA-256: c4ead2c0d4e0291f6db17fc5d9e1d3079f43f4a355436be22e41097aabf0352e
ppc
autofs-5.0.1-0.rc2.55.el5.1.ppc.rpm	SHA-256: 37a75f612750d243f3498a51f929611842fe735b41143156c6d4e7eaa28d5eba

Red Hat Enterprise Linux Server from RHUI 5

SRPM
autofs-5.0.1-0.rc2.55.el5.1.src.rpm	SHA-256: c4ead2c0d4e0291f6db17fc5d9e1d3079f43f4a355436be22e41097aabf0352e
x86_64
autofs-5.0.1-0.rc2.55.el5.1.x86_64.rpm	SHA-256: 92b4e9923846913ae8f90a6e756e950c04318d6c9f97d3c76b48666679ce7e3e
i386
autofs-5.0.1-0.rc2.55.el5.1.i386.rpm	SHA-256: 830204018a092938a38dbadb223c557e15875e638c4b0d8073749cb71552bc94