Red Hat Security Advisory 2015-0165-01 – Subversion is a concurrent version control system which enables one or more users to collaborate in developing and maintaining a hierarchy of files and directories while keeping a history of all changes. The mod_dav_svn module is used with the Apache HTTP Server to allow access to Subversion repositories via HTTP. A NULL pointer dereference flaw was found in the way the mod_dav_svn module handled REPORT requests. A remote, unauthenticated attacker could use a specially crafted REPORT request to crash mod_dav_svn. It was discovered that Subversion clients retrieved cached authentication credentials using the MD5 hash of the server realm string without also checking the server’s URL. A malicious server able to provide a realm that triggers an MD5 collision could possibly use this flaw to obtain the credentials for a different realm.

Ubuntu Security Notice 2498-1 – It was discovered that Kerberos incorrectly sent old keys in response to a -randkey -keepold request. An authenticated remote attacker could use this issue to forge tickets by leveraging administrative access. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. It was discovered that the libgssapi_krb5 library incorrectly processed security context handles. A remote attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

Red Hat Security Advisory 2015-0164-01 – The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel’s splice() system call validated its parameters. On certain file systems, a local, unprivileged user could use this flaw to write past the maximum file size, and thus crash the system.

Ubuntu Security Notice 2495-1 – A use-after-free bug was discovered in the DOM implementation in Blink. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via renderer crash or execute arbitrary code with the privileges of the sandboxed render process. It was discovered that V8 did not properly consider frame access restrictions when throwing exceptions in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to bypass same origin restrictions. Various other issues were also addressed.

Debian Linux Security Advisory 3159-1 – It was discovered that the REXML parser, part of the interpreter for the Ruby language, could be coerced into allocating large string objects that could consume all available memory on the system. This could allow remote attackers to cause a denial of service (crash).

Red Hat Security Advisory 2015-0166-01 – Subversion is a concurrent version control system which enables one or more users to collaborate in developing and maintaining a hierarchy of files and directories while keeping a history of all changes. The mod_dav_svn module is used with the Apache HTTP Server to allow access to Subversion repositories via HTTP. A NULL pointer dereference flaw was found in the way the mod_dav_svn module handled REPORT requests. A remote, unauthenticated attacker could use a specially crafted REPORT request to crash mod_dav_svn. A NULL pointer dereference flaw was found in the way the mod_dav_svn module handled certain requests for URIs that trigger a lookup of a virtual transaction name. A remote, unauthenticated attacker could send a request for a virtual transaction name that does not exist, causing mod_dav_svn to crash.