Apple Security Advisory 2015-04-08-2 - OS X Yosemite 10.10.3 and Security Update 2015-004 are now available and address privilege escalation, code execution, information disclosure, and various other vulnerabilities.
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Mandriva Linux Security Advisory 2015-093 - Updated apache packages fix multiple security vulnerabilities.
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Slackware Security Advisory - New httpd packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix security issues.
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Red Hat Security Advisory 2014-0921-01 - The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. A race condition flaw, leading to heap-based buffer overflows, was found in the mod_status httpd module. A remote attacker able to access a status page served by mod_status on a server using a threaded Multi-Processing Module could send a specially crafted request that would cause the httpd child process to crash or, possibly, allow the attacker to execute arbitrary code with the privileges of the "apache" user. A NULL pointer dereference flaw was found in the mod_cache httpd module. A malicious HTTP server could cause the httpd child process to crash when the Apache HTTP Server was used as a forward proxy with caching.
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Red Hat Security Advisory 2014-0922-01 - The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. A race condition flaw, leading to heap-based buffer overflows, was found in the mod_status httpd module. A remote attacker able to access a status page served by mod_status on a server using a threaded Multi-Processing Module could send a specially crafted request that would cause the httpd child process to crash or, possibly, allow the attacker to execute arbitrary code with the privileges of the "apache" user. A NULL pointer dereference flaw was found in the mod_cache httpd module. A malicious HTTP server could cause the httpd child process to crash when the Apache HTTP Server was used as a forward proxy with caching.
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Ubuntu Security Notice 2299-1 - Marek Kroemeke discovered that the mod_proxy module incorrectly handled certain requests. A remote attacker could use this issue to cause the server to stop responding, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS. Giancarlo Pellegrino and Davide Balzarotti discovered that the mod_deflate module incorrectly handled body decompression. A remote attacker could use this issue to cause resource consumption, leading to a denial of service. Various other issues were also addressed.
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Apache versions 2.4.x prior to 2.4.10 suffer from a denial of service condition when mod_proxy is in use.
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