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CVE-2007-4573

7.2
Critical

CVE-2007-4573

secalert@redhat.com
Modified

Description

The IA32 system call emulation functionality in Linux kernel 2.4.x and 2.6.x before 2.6.22.7, when running on the x86_64 architecture, does not zero extend the eax register after the 32bit entry path to ptrace is used, which might allow local users to gain privileges by triggering an out-of-bounds access to the system call table using the %RAX register.

Exploits

306042007-09-21localLinux

Linux Kernel 2.6.x - Ptrace Privilege Escalation

By Wojciech Purczynski

References

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http://fedoranews.org/updates/FEDORA-2007-229.shtml
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http://lkml.org/lkml/2007/9/21/512
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http://lkml.org/lkml/2007/9/21/513
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http://secunia.com/advisories/26917
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http://secunia.com/advisories/26919
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http://secunia.com/advisories/26934
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http://secunia.com/advisories/26953
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http://secunia.com/advisories/26955
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http://secunia.com/advisories/26978
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http://secunia.com/advisories/26994
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http://secunia.com/advisories/26995
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http://secunia.com/advisories/27212
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http://secunia.com/advisories/27227
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http://secunia.com/advisories/27912
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http://secunia.com/advisories/29058
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http://securitytracker.com/id?1018748
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http://www.debian.org/security/2007/dsa-1378
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http://www.debian.org/security/2007/dsa-1381
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http://www.debian.org/security/2008/dsa-1504
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http://www.securityfocus.com/bid/25774
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http://www.ubuntu.com/usn/usn-518-1
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http://www.vupen.com/english/advisories/2007/3246
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https://issues.rpath.com/browse/RPL-1754