Secunia Advisory SA28835Linux Kernel "vmsplice()" System Call Vulnerabilities
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Description
Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service), disclose potentially sensitive information, and gain escalated privileges. The vulnerabilities are caused due to the missing verification of parameters within the "vmsplice_to_user()", "copy_from_user_mmap_sem()", and "get_iovec_page_array()" functions in fs/splice.c before using them to perform certain memory operations. This can be exploited to e.g. read or write to arbitrary kernel memory via a specially crafted "vmsplice()" system call. Successful exploitation allows attackers to e.g. gain "root" privileges. Note: The affected system call first appeared in version 2.6.17. Solution Provided and/or discovered by Deep Links Do you have additional information related to this advisory?Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com
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