Integer overflow in the amap_alloc1 function in OpenBSD 5.8 and 5.9 allows local users to execute arbitrary code with kernel privileges via a large size value.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| http://www.securitytracker.com/id/1036318 | vdb entry |
| http://www.openbsd.org/errata59.html | release notes |
| http://www.openwall.com/lists/oss-security/2016/07/14/5 | third party advisory mailing list |
| http://www.openwall.com/lists/oss-security/2016/07/17/7 | mailing list exploit third party advisory |
| http://www.openbsd.org/errata58.html | release notes |
| http://www.securityfocus.com/bid/91805 | vdb entry |