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CVE-2017-1000112

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2019-4159-01
Posted Dec 10, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-4159-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2017-1000112, CVE-2017-7184, CVE-2018-1068, CVE-2018-13405, CVE-2018-18559, CVE-2018-9568, CVE-2019-5489
SHA-256 | c4d981a6d20c3b68f13754d69107ef1f2830d0614b7c688281421d5b6b20e939
Red Hat Security Advisory 2019-1931-01
Posted Jul 29, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1931-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A memory corruption issue was addressed.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2017-1000112
SHA-256 | fdfbc64347b16705a845cde3571301a69f3ee1b416feed39d11c6ed5d7f70b5b
Red Hat Security Advisory 2019-1932-01
Posted Jul 29, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-1932-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A memory corruption issue was addressed.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2017-1000112
SHA-256 | fedaf323e38f2e5c6aa9a5e10c0223ec7d9c1a8f85e4e67621b5d2621fcf3148
Linux Kernel UDP Fragmentation Offset (UFO) Privilege Escalation
Posted Aug 3, 2018
Authored by h00die, Brendan Coles, Andrey Konovalov | Site metasploit.com

This Metasploit module attempts to gain root privileges on Linux systems by abusing UDP Fragmentation Offload (UFO). This exploit targets only systems using Ubuntu (Trusty / Xenial) kernels 4.4.0-21 <= 4.4.0-89 and 4.8.0-34 <= 4.8.0-58, including Linux distros based on Ubuntu, such as Linux Mint. The target system must have unprivileged user namespaces enabled and SMAP disabled. Bypasses for SMEP and KASLR are included. Failed exploitation may crash the kernel. This Metasploit module has been tested successfully on various Ubuntu and Linux Mint systems, including: Ubuntu 14.04.5 4.4.0-31-generic x64 Desktop; Ubuntu 16.04 4.8.0-53-generic; Linux Mint 17.3 4.4.0-89-generic; Linux Mint 18 4.8.0-58-generic

tags | exploit, kernel, root, udp
systems | linux, ubuntu
advisories | CVE-2017-1000112
SHA-256 | f3e398dc7268af675856d83dae02dec9fd8bde412098486a7565fb7cdd8541e2
Red Hat Security Advisory 2017-3200-01
Posted Nov 15, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-3200-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a raw packet socket could use this flaw to elevate their privileges on the system.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000111, CVE-2017-1000112, CVE-2017-14106
SHA-256 | 2ed8a67f11427e2d2b9d276e27f1f3887b343d36c2da2af2fbeeaf1a4deb0cdc
Red Hat Security Advisory 2017-2931-01
Posted Oct 19, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2931-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: Out-of-bounds kernel heap access vulnerability was found in xfrm, kernel's IP framework for transforming packets. An error dealing with netlink messages from an unprivileged user leads to arbitrary read/write and privilege escalation. A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a raw packet socket could use this flaw to elevate their privileges on the system.

tags | advisory, arbitrary, kernel, local
systems | linux, redhat
advisories | CVE-2016-8399, CVE-2017-1000111, CVE-2017-1000112, CVE-2017-11176, CVE-2017-14106, CVE-2017-7184, CVE-2017-7541, CVE-2017-7542, CVE-2017-7558
SHA-256 | edba1cdf75883b0afd4147a1b9b0f8c787387b79a168379d1cee80de73ebe1ea
Red Hat Security Advisory 2017-2930-01
Posted Oct 19, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2930-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: Out-of-bounds kernel heap access vulnerability was found in xfrm, kernel's IP framework for transforming packets. An error dealing with netlink messages from an unprivileged user leads to arbitrary read/write and privilege escalation. A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a raw packet socket could use this flaw to elevate their privileges on the system.

tags | advisory, arbitrary, kernel, local
systems | linux, redhat
advisories | CVE-2016-8399, CVE-2017-1000111, CVE-2017-1000112, CVE-2017-11176, CVE-2017-14106, CVE-2017-7184, CVE-2017-7541, CVE-2017-7542, CVE-2017-7558
SHA-256 | e290a5f1dc4b6935b2c09d9c88039750f701a314dff84bdf0a026e7c338e354d
Red Hat Security Advisory 2017-2918-01
Posted Oct 19, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2918-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: Out-of-bounds kernel heap access vulnerability was found in xfrm, kernel's IP framework for transforming packets. An error dealing with netlink messages from an unprivileged user leads to arbitrary read/write and privilege escalation. A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a raw packet socket could use this flaw to elevate their privileges on the system.

tags | advisory, arbitrary, kernel, local
systems | linux, redhat
advisories | CVE-2017-1000111, CVE-2017-1000112, CVE-2017-11176, CVE-2017-14106, CVE-2017-14340, CVE-2017-7184, CVE-2017-7541, CVE-2017-7542, CVE-2017-7558
SHA-256 | 668de5ec7c2ffb14d70f655cc1fae90c9916874f80e9a59e8ec1cecdaf1fa43b
Kernel Live Patch Security Notice LSN-0028-1
Posted Aug 18, 2017
Authored by Benjamin M. Romer

Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload (UFO) code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local, udp
systems | linux
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | f1d27ee9e08fb4d7aba3b36609845fbfa5e959afbcd42c78b5b81f4e0bfae6db
Ubuntu Security Notice USN-3386-2
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3386-2 - USN-3386-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | a876e7d4b791e40fefb320217a46bff63e6300d72ad9306f4f51b493d9536c67
Ubuntu Security Notice USN-3386-1
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3386-1 - Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | 647b2d1d1c8bb541cd4e3690728e76a854d20ea18c6dba3a92754a2e3124f25b
Ubuntu Security Notice USN-3385-2
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3385-2 - USN-3385-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | 664a65bdbca4a92e2983a2e23ad4f87d42ad55a05cf9741672aaffa9b5128288
Ubuntu Security Notice USN-3385-1
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3385-1 - Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | f410650ac5386976fb5b72d6502ef110b7e9e6a866a422120c929e5c641a36b1
Ubuntu Security Notice USN-3384-2
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3384-2 - USN-3384-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | f900ee14d39b21ba30d2c6c233e495641d3cbde809659718430d6eec5a923fb1
Ubuntu Security Notice USN-3384-1
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3384-1 - Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
SHA-256 | 9c0a1ae85f7530bab528e798e750966790ccbf6b7702ec5330b525b7b5c41602
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