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SUSE-SU-2017:2476-1

Опубликовано: 14 сент. 2017
Источник: suse-cvrf

Описание

Security update for Linux Kernel Live Patch 26 for SLE 12

This update for the Linux Kernel 3.12.61-52_89 fixes several issues.

The following security bugs were fixed:

  • CVE-2017-9242: The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel was too late in checking whether an overwrite of an skb data structure may occur, which allowed local users to cause a denial of service (system crash) via crafted system calls (bsc#1042892).
  • CVE-2017-7645: The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel allowed remote attackers to cause a denial of service (system crash) via a long RPC reply (bsc#1046191).

Список пакетов

SUSE Linux Enterprise Server 12-LTSS
kgraft-patch-3_12_61-52_89-default-2-2.2
kgraft-patch-3_12_61-52_89-xen-2-2.2

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 Server 12-LTSS:kgraft-patch-3_12_61-52_89-default-2-2.2
SUSE Linux Enterprise Server 12-LTSS:kgraft-patch-3_12_61-52_89-xen-2-2.2
Ссылки

Описание

The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel through 4.10.11 allows remote attackers to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c.

Затронутые продукты
SUSE Linux Enterprise Server 12-LTSS:kgraft-patch-3_12_61-52_89-default-2-2.2
SUSE Linux Enterprise Server 12-LTSS:kgraft-patch-3_12_61-52_89-xen-2-2.2
Ссылки

Описание

The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls.

Затронутые продукты
SUSE Linux Enterprise Server 12-LTSS:kgraft-patch-3_12_61-52_89-default-2-2.2
SUSE Linux Enterprise Server 12-LTSS:kgraft-patch-3_12_61-52_89-xen-2-2.2
Ссылки