Buffer overflow in the imap_fetch_overview function in the IMAP functionality (php_imap.c) in PHP before 4.3.3 allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long e-mail address in a (1) To or (2) From header.

Updated PHP packages that fix multiple security issues are now available for Red Hat Enterprise Linux 3 and 4.

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

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server.

The phpinfo() PHP function did not properly sanitize long strings. An attacker could use this to perform cross-site scripting attacks against sites that have publicly-available PHP scripts that call phpinfo(). (CVE-2006-0996)

The html_entity_decode() PHP function was found to not be binary safe.
An attacker could use this flaw to disclose a certain part of the memory. In order for this issue to be exploitable the target site would need to have a PHP script which called the 'html_entity_decode()' function with untrusted input from the user and displayed the result. (CVE-2006-1490)

The error handling output was found to not properly escape HTML output in certain cases. An attacker could use this flaw to perform cross-site scripting attacks against sites where both display_errors and html_errors are enabled. (CVE-2006-0208)

An input validation error was found in the 'mb_send_mail()' function.
An attacker could use this flaw to inject arbitrary headers in a mail sent via a script calling the 'mb_send_mail()' function where the 'To' parameter can be controlled by the attacker. (CVE-2005-3883)

A buffer overflow flaw was discovered in uw-imap, the University of Washington's IMAP Server. php-imap is compiled against the static c-client libraries from imap and therefore needed to be recompiled against the fixed version. This issue only affected Red Hat Enterprise Linux 3. (CVE-2005-2933).

Users of PHP should upgrade to these updated packages, which contain backported patches that resolve these issues.

Updated PHP packages that fix multiple security issues are now available for Red Hat Enterprise Linux 2.1.

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

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server.

The phpinfo() PHP function did not properly sanitize long strings. An attacker could use this to perform cross-site scripting attacks against sites that have publicly-available PHP scripts that call phpinfo(). (CVE-2006-0996)

The error handling output was found to not properly escape HTML output in certain cases. An attacker could use this flaw to perform cross-site scripting attacks against sites where both display_errors and html_errors are enabled. (CVE-2006-0208)

A buffer overflow flaw was discovered in uw-imap, the University of Washington's IMAP Server. php-imap is compiled against the static c-client libraries from imap and therefore needed to be recompiled against the fixed version. (CVE-2005-2933)

The wordwrap() PHP function did not properly check for integer overflow in the handling of the 'break' parameter. An attacker who could control the string passed to the 'break' parameter could cause a heap overflow. (CVE-2006-1990)

Users of PHP should upgrade to these updated packages, which contain backported patches that resolve these issues.

The remote Redhat Enterprise Linux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2006:0276 advisory.

    PHP is an HTML-embedded scripting language commonly used with the Apache     HTTP Web server.

    The phpinfo() PHP function did not properly sanitize long strings.  An     attacker could use this to perform cross-site scripting attacks against     sites that have publicly-available PHP scripts that call phpinfo().
    (CVE-2006-0996)

    The html_entity_decode() PHP function was found to not be binary safe. An     attacker could use this flaw to disclose a certain part of the memory.  In     order for this issue to be exploitable the target site would need to have a     PHP script which called the html_entity_decode() function with untrusted     input from the user and displayed the result.  (CVE-2006-1490)

    The error handling output was found to not properly escape HTML output in     certain cases.  An attacker could use this flaw to perform cross-site     scripting attacks against sites where both display_errors and html_errors     are enabled.  (CVE-2006-0208)

    An input validation error was found in the mb_send_mail() function.  An     attacker could use this flaw to inject arbitrary headers in a mail sent via     a script calling the mb_send_mail() function where the To parameter can     be controlled by the attacker.  (CVE-2005-3883)

    A buffer overflow flaw was discovered in uw-imap, the University of     Washington's IMAP Server.  php-imap is compiled against the static c-client     libraries from imap and therefore needed to be recompiled against the fixed     version.  This issue only affected Red Hat Enterprise Linux 3.
    (CVE-2005-2933).

    Users of PHP should upgrade to these updated packages, which contain     backported patches that resolve these issues.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

ID	Name	Product	Family	Severity
21897	CentOS 3 / 4 : php (CESA-2006:0276)	Nessus	CentOS Local Security Checks	high
21594	RHEL 2.1 : php (RHSA-2006:0501)	Nessus	Red Hat Local Security Checks	high
21287	RHEL 4 : php (RHSA-2006:0276)	Nessus	Red Hat Local Security Checks	medium

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