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SUSE-SU-2017:2473-1

Опубликовано: 14 сент. 2017
Источник: suse-cvrf

Описание

Security update for Linux Kernel Live Patch 11 for SLE 12 SP2

This update for the Linux Kernel 4.4.74-92_32 fixes several issues.

The following security bugs were fixed:

  • CVE-2017-1000112: Prevent a race condition in net-packet code that could have been exploited by unprivileged users to gain root access (bsc#1052368).

Список пакетов

SUSE Linux Enterprise Live Patching 12
kgraft-patch-4_4_74-92_32-default-2-2.1

Ссылки

Описание

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.

Затронутые продукты
SUSE Linux Enterprise Live Patching 12:kgraft-patch-4_4_74-92_32-default-2-2.1
Ссылки