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xfrm Out-Of-Bounds Read
Posted Jul 12, 2017
Authored by bo Zhang

When dealing with XFRM_MSG_MIGRATE message, xfrm_migrate func does not check dir value of xfrm_userpolicy_id. This will cause out of bound access to net->xfrm.policy_bydst in policy_hash_direct func and others when dir value exceeds XFRM_POLICY_MAX. Linux kernel versions 4.12 and below are affected.

tags | advisory, kernel
systems | linux
SHA-256 | b19c3f5d900e2c98a719a1ba12c9f79494c5c8cd41263ce11198720a5851bd92
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