The good_client function in rquotad (rquota_svc.c) in Linux DiskQuota (aka quota) before 3.17 invokes the hosts_ctl function the first time without a host name, which might allow remote attackers to bypass TCP Wrappers rules in hosts.deny.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The good_client function in rquotad (rquota_svc.c) in Linux DiskQuota (aka quota) before 3.17 invokes the     hosts_ctl function the first time without a host name, which might allow remote attackers to bypass TCP     Wrappers rules in hosts.deny. (CVE-2012-3417)

Note that Nessus relies on the presence of the package as reported by the vendor.

quota was fixed to handle tcp wrappers in rquotad correctly.

The remote Oracle Linux 5 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2013-0120 advisory.

    - Fix CVE-2012-3417 (incorrect use of tcp_wrappers) (Resolves: #841448)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The quota package was updated to fix an issue with tcp_wrappers, where hosts.allow/deny files would have not been correctly honored.
(CVE-2012-3417)

It was discovered that the rpc.rquotad service did not use tcp_wrappers correctly. Certain hosts access rules defined in '/etc/hosts.allow' and '/etc/hosts.deny' may not have been honored, possibly allowing remote attackers to bypass intended access restrictions. (CVE-2012-3417)

This update also fixes the following bugs :

  - Prior to this update, values were not properly     transported via the remote procedure call (RPC) and     interpreted by the client when querying the quota usage     or limits for network-mounted file systems if the quota     values were 2^32 kilobytes or greater. As a consequence,     the client reported mangled values. This update modifies     the underlying code so that such values are correctly     interpreted by the client.

  - Prior to this update, warnquota sent messages about     exceeded quota limits from a valid domain name if the     warnquota tool was enabled to send warning e-mails and     the superuser did not change the default warnquota     configuration. As a consequence, the recipient could     reply to invalid addresses. This update modifies the     default warnquota configuration to use the reserved     example.com. domain. Now, warnings about exceeded quota     limits are sent from the reserved domain that inform the     superuser to change to the correct value.

  - Previously, quota utilities could not recognize the file     system as having quotas enabled and refused to operate     on it due to incorrect updating of /etc/mtab. This     update prefers /proc/mounts to get a list of file     systems with enabled quotas. Now, quota utilities     recognize file systems with enabled quotas as expected.

  - Prior to this update, the setquota(8) tool on XFS file     systems failed to set disk limits to values greater than     2^31 kilobytes. This update modifies the integer     conversion in the setquota(8) tool to use a 64-bit     variable big enough to store such values.

An updated quota package that fixes one security issue and multiple bugs is now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low 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.

The quota package provides system administration tools for monitoring and limiting user and group disk usage on file systems.

It was discovered that the rpc.rquotad service did not use tcp_wrappers correctly. Certain hosts access rules defined in '/etc/hosts.allow' and '/etc/hosts.deny' may not have been honored, possibly allowing remote attackers to bypass intended access restrictions. (CVE-2012-3417)

This issue was discovered by the Red Hat Security Response Team.

This update also fixes the following bugs :

* Prior to this update, values were not properly transported via the remote procedure call (RPC) and interpreted by the client when querying the quota usage or limits for network-mounted file systems if the quota values were 2^32 kilobytes or greater. As a consequence, the client reported mangled values. This update modifies the underlying code so that such values are correctly interpreted by the client.
(BZ#667360)

* Prior to this update, warnquota sent messages about exceeded quota limits from a valid domain name if the warnquota tool was enabled to send warning e-mails and the superuser did not change the default warnquota configuration. As a consequence, the recipient could reply to invalid addresses. This update modifies the default warnquota configuration to use the reserved example.com. domain. Now, warnings about exceeded quota limits are sent from the reserved domain that inform the superuser to change to the correct value. (BZ#680429)

* Previously, quota utilities could not recognize the file system as having quotas enabled and refused to operate on it due to incorrect updating of /etc/mtab. This update prefers /proc/mounts to get a list of file systems with enabled quotas. Now, quota utilities recognize file systems with enabled quotas as expected. (BZ#689822)

* Prior to this update, the setquota(8) tool on XFS file systems failed to set disk limits to values greater than 2^31 kilobytes. This update modifies the integer conversion in the setquota(8) tool to use a 64-bit variable big enough to store such values. (BZ#831520)

All users of quota are advised to upgrade to this updated package, which contains backported patches to resolve these issues.

ID	Name	Product	Family	Severity
217779	Linux Distros Unpatched Vulnerability : CVE-2012-3417	Nessus	Misc.	critical
74721	openSUSE Security Update : quota (openSUSE-SU-2012:1058-1)	Nessus	SuSE Local Security Checks	medium
68691	Oracle Linux 5 : quota (ELSA-2013-0120)	Nessus	Oracle Linux Local Security Checks	critical
64224	SuSE 11.1 Security Update : quota (SAT Patch Number 6737)	Nessus	SuSE Local Security Checks	medium
64223	SuSE 11.2 Security Update : quota (SAT Patch Number 6724)	Nessus	SuSE Local Security Checks	medium
63602	Scientific Linux Security Update : quota on SL5.x i386/x86_64 (20130108)	Nessus	Scientific Linux Local Security Checks	medium
63565	CentOS 5 : quota (CESA-2013:0120)	Nessus	CentOS Local Security Checks	medium
63403	RHEL 5 : quota (RHSA-2013:0120)	Nessus	Red Hat Local Security Checks	medium
61771	SuSE 10 Security Update : quota (ZYPP Patch Number 8255)	Nessus	SuSE Local Security Checks	medium

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