Debian: New Linux 2.6.18 packages fix several vulnerabilities

    Date02 Oct 2007
    CategoryDebian
    2967
    Posted ByLinuxSecurity Advisories
    Several local vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems:
    - -------------------------------------------------------------------------- Debian Security Advisory DSA 1381-1 This email address is being protected from spambots. You need JavaScript enabled to view it. http://www.debian.org/security/ Dann Frazier October 2nd, 2007 http://www.debian.org/security/faq - -------------------------------------------------------------------------- Package : linux-2.6 Vulnerability : several Problem-Type : local Debian-specific: no CVE ID : CVE-2006-5755 CVE-2007-4133 CVE-2007-4573 CVE-2007-5093 Several local vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2006-5755 The NT bit maybe leaked into the next task which can local attackers to cause a Denial of Service (crash) on systems which run the 'amd64' flavour kernel. The stable distribution ('etch') was not believed to be vulnerable to this issue at the time of release, however Bastian Blank discovered that this issue still applied to the 'xen-amd64' and 'xen-vserver-amd64' flavours, and is resolved by this DSA. CVE-2007-4133 Hugh Dickins discovered a potential local DoS (panic) in hugetlbfs. A misconversion of hugetlb_vmtruncate_list to prio_tree may allow local users to trigger a BUG_ON() call in exit_mmap. CVE-2007-4573 Wojciech Purczynski discovered a vulnerability that can be exploited by a local user to obtain superuser privileges on x86_64 systems. This resulted from improper clearing of the high bits of registers during ia32 system call emulation. This vulnerability is relevant to the Debian amd64 port as well as users of the i386 port who run the amd64 linux-image flavour. DSA-1378 resolved this problem for the 'amd64' flavour kernels, but Tim Wickberg and Ralf Hemmenst 
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