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Linux Kernel ptrace Local Privilege Escalation Vulnerability
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Secunia Advisory:
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SA26934
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Release Date:
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2007-09-24
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Last Update:
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2007-10-05
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Popularity:
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8,126 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| OS: | Linux Kernel 2.4.x
Linux Kernel 2.6.x
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| CVE reference: | CVE-2007-4573
CVE-2007-5087
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Description:
Wojciech Purczynski has reported a vulnerability in the Linux kernel, which can be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to the kernel not zero-extending x86_64 registers after ptrace in the 32bit entry path in arch/x86_64/ia32/ia32entry.S on x86_64 platforms.
The vulnerability is reported in versions prior to 2.4.35.3 and 2.6.22.7.
Note: A problem in the ATM module, which can cause a kernel panic, has also been reported by Gilles Espinasse.
Solution:
Update to version 2.4.35.3 or 2.6.22.7.
Provided and/or discovered by:
Wojciech Purczynski
Changelog:
2007-09-24: Updated "Description".
2007-09-28: Added CVE reference.
2007-10-05: Added link to iSEC in "Original Advisory" section.
Original Advisory:
http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.35.3
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.7
iSEC:
http://www.isec.pl/vulnerabilities/isec-0025-syscall-emulation.txt
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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