PHP: Integer overflow

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-lang/php	< 5.1.6-r6	revision >= 4.4.4-r6, revision >= 4.4.6, revision >= 4.4.7, revision >= 4.4.8_pre20070816, >= 5.1.6-r6	All supported architectures

Related bugreports: #150261

PHP is vulnerable to an integer overflow potentially allowing the remote execution of arbitrary code.

2. Impact Information

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

A flaw in the PHP memory handling routines allows an unserialize() call to be executed on non-allocated memory due to a previous integer overflow.

An attacker could execute arbitrary code with the rights of the web server user or the user running a vulnerable PHP script.

3. Resolution Information

There is no known workaround at this time.

All PHP 5.x users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/php-5.1.6-r6"

All PHP 4.x users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/php-4.4.4-r6"

4. References

Page updated October 30, 2006

Summary: This is a Gentoo Linux Security Advisory

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