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OpenBSD Semaphore Limit Integer Overflow
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Secunia Advisory:
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SA9722
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Release Date:
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2003-09-13
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Popularity:
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7,780 views
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Critical:
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Not 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: | OpenBSD 3.x
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Description:
A vulnerability has been identified in OpenBSD allowing a malicious root user to escalate privileges.
The problem is that the "root" user may set the semaphore limit to a high value, which causes an integer overflow. This could be exploited to bypass the security level access control (securelevel) specified at boot time.
Solution:
A patch is available for OpenBSD 3.3:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.3/common/003_sysvsem.patch
This has been fixed in OpenBSD current.
Original Advisory:
http://www.openbsd.org/errata.html#sysvsem
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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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