SUSE Security Announcement SUSE-SA:2006:042 - A slew of kernel related vulnerabilities has been fixed in SUSE Linux for the 2.6 series.
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Linux kernel versions 2.6.13 through 2.6.17.4 logrotate prctl() local root exploit.
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Local root exploit for the linux kernel PRCTL core dump handling vulnerability. Affected kernel versions greater than or equal to 2.6.13 and below version 2.6.17.4. Tested by author on 2.6.9-22.ELsmp.
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The suid_dumpable support in Linux kernel 2.6.13 up to versions before 2.6.17.4, and 2.6.16 before 2.6.16.24, allows a local user to cause a denial of service (disk consumption) and POSSIBLY gain privileges via the PR_SET_DUMPABLE argument of the prctl function and a program that causes a core dump file to be created in a directory for which the user does not have permissions.
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Local root exploit for the linux kernel PRCTL core dump handling vulnerability. Affected kernel versions greater than or equal to 2.6.13 and below version 2.6.17.4.
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Ubuntu Security Notice 311-1 - A race condition was discovered in the do_add_counters() functions. Processes which do not run with full root privileges, but have the CAP_NET_ADMIN capability can exploit this to crash the machine or read a random piece of kernel memory. In Ubuntu there are no packages that are affected by this, so this can only be an issue for you if you use third-party software that uses Linux capabilities. John Stultz discovered a faulty BUG_ON trigger in the handling of POSIX timers. A local attacker could exploit this to trigger a kernel oops and crash the machine. Dave Jones discovered that the PowerPC kernel did not perform certain required access_ok() checks. A local user could exploit this to read arbitrary kernel memory and crash the kernel on 64-bit systems, and possibly read arbitrary kernel memory on 32-bit systems. A design flaw was discovered in the prctl(PR_SET_DUMPABLE, ...) system call, which allowed a local user to have core dumps created in a directory he could not normally write to. This could be exploited to drain available disk space on system partitions, or, under some circumstances, to execute arbitrary code with full root privileges. This flaw only affects Ubuntu 6.06 LTS.
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rPath Security Advisory: 2006-0122-1 - Multiple kernel vulnerabilities have been address in rPath Linux.
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