Ubuntu Security Notice 1569-1 - It was discovered that PHP incorrectly handled certain character sequences when applying HTTP response-splitting protection. A remote attacker could create a specially-crafted URL and inject arbitrary headers. It was discovered that PHP incorrectly handled directories with a large number of files. This could allow a remote attacker to execute arbitrary code with the privileges of the web server, or to perform a denial of service. Various other issues were also addressed.
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