Ubuntu: (Multiple Advisories) (CVE-2017-1000112): Linux kernel (Trusty HWE) vulnerabilities
Description
Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. When building a UFO packet with MSG_MORE __ip_append_data() calls ip_ufo_append_data() to append. However in between two send() calls, the append path can be switched from UFO to non-UFO one, which leads to a memory corruption. In case UFO packet lengths exceeds MTU, copy = maxfraglen - skb->len becomes negative on the non-UFO path and the branch to allocate new skb is taken. This triggers fragmentation and computation of fraggap = skb_prev->len - maxfraglen. Fraggap can exceed MTU, causing copy = datalen - transhdrlen - fraggap to become negative. Subsequently skb_copy_and_csum_bits() writes out-of-bounds. A similar issue is present in IPv6 code. The bug was introduced in e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach") on Oct 18 2005.
Solution(s)
- ubuntu-upgrade-linux-image-3-13-0-128-generic
- ubuntu-upgrade-linux-image-3-13-0-128-generic-lpae
- ubuntu-upgrade-linux-image-3-13-0-128-lowlatency
- ubuntu-upgrade-linux-image-3-13-0-128-powerpc-e500
- ubuntu-upgrade-linux-image-3-13-0-128-powerpc-e500mc
- ubuntu-upgrade-linux-image-3-13-0-128-powerpc-smp
- ubuntu-upgrade-linux-image-3-13-0-128-powerpc64-emb
- ubuntu-upgrade-linux-image-3-13-0-128-powerpc64-smp
- ubuntu-upgrade-linux-image-4-10-0-1015-raspi2
- ubuntu-upgrade-linux-image-4-10-0-32-generic
- ubuntu-upgrade-linux-image-4-10-0-32-generic-lpae
- ubuntu-upgrade-linux-image-4-10-0-32-lowlatency
- ubuntu-upgrade-linux-image-4-4-0-1026-gke
- ubuntu-upgrade-linux-image-4-4-0-1030-aws
- ubuntu-upgrade-linux-image-4-4-0-1069-raspi2
- ubuntu-upgrade-linux-image-4-4-0-1071-snapdragon
- ubuntu-upgrade-linux-image-4-4-0-91-generic
- ubuntu-upgrade-linux-image-4-4-0-91-generic-lpae
- ubuntu-upgrade-linux-image-4-4-0-91-lowlatency
- ubuntu-upgrade-linux-image-4-4-0-91-powerpc-e500mc
- ubuntu-upgrade-linux-image-4-4-0-91-powerpc-smp
- ubuntu-upgrade-linux-image-4-4-0-91-powerpc64-emb
- ubuntu-upgrade-linux-image-4-4-0-91-powerpc64-smp
- ubuntu-upgrade-linux-image-aws
- ubuntu-upgrade-linux-image-generic
- ubuntu-upgrade-linux-image-generic-hwe-16-04
- ubuntu-upgrade-linux-image-generic-lpae
- ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
- ubuntu-upgrade-linux-image-generic-lpae-lts-trusty
- ubuntu-upgrade-linux-image-generic-lpae-lts-xenial
- ubuntu-upgrade-linux-image-generic-lts-trusty
- ubuntu-upgrade-linux-image-generic-lts-xenial
- ubuntu-upgrade-linux-image-gke
- ubuntu-upgrade-linux-image-lowlatency
- ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
- ubuntu-upgrade-linux-image-lowlatency-lts-xenial
- ubuntu-upgrade-linux-image-powerpc-e500
- ubuntu-upgrade-linux-image-powerpc-e500mc
- ubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenial
- ubuntu-upgrade-linux-image-powerpc-smp
- ubuntu-upgrade-linux-image-powerpc-smp-lts-xenial
- ubuntu-upgrade-linux-image-powerpc64-emb
- ubuntu-upgrade-linux-image-powerpc64-emb-lts-xenial
- ubuntu-upgrade-linux-image-powerpc64-smp
- ubuntu-upgrade-linux-image-powerpc64-smp-lts-xenial
- ubuntu-upgrade-linux-image-raspi2
- ubuntu-upgrade-linux-image-snapdragon
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