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OpenBSD systrace "systrace_preprepl()" Integer Overflow Vulnerability
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Secunia Advisory:
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SA22324
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Release Date:
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2006-10-09
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Last Update:
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2006-11-06
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Popularity:
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8,090 views
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
Privilege escalation
DoS
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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: | OpenBSD 3.x
OpenBSD 4.0
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Subscribe:
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| CVE reference: | CVE-2006-5218
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Description:
A vulnerability has been reported in OpenBSD's systrace, which can be exploited by malicious, local users to gain knowledge of potentially sensitive information, cause a DoS (Denial of Service) and gain escalated privileges.
The vulnerability is caused due to an integer overflow within the "systrace_preprepl()" function. By sending large integer values to the ioctl() syscall, this can be exploited to read kernel memory, cause a DoS or gain escalated privileges.
Note: This issue was also reported in NetBSD 3.
Solution:
Apply patches.
OpenBSD 3.8:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.8/common/019_systrace.patch
OpenBSD 3.9:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/014_systrace.patch
OpenBSD 4.0:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.0/common/003_systrace.patch
Provided and/or discovered by:
Chris Evans
Changelog:
2006-10-12: Added CVE reference.
2006-11-06: Added information about OpenBSD 4.0.
Original Advisory:
http://openbsd.org/errata.html#systrace
http://scary.beasts.org/security/CESA-2006-003.html
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About this Secunia Advisory
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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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