CVE-2017-1000364

An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be "jumped" over (the stack guard page is bypassed), this affects Linux Kernel versions 4.11.5 and earlier (the stackguard page was introduced in 2010).

This kernel update is based on upstream 4.4.74 and fixes at least the following security issues:

The ipxitf_ioctl function in net/ipx/af_ipx.c in the Linux kernel through 4.11.1 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a failed SIOCGIFADDR ioctl call for an IPX interface (CVE-2017-7487).

The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel through 4.10.15 allows attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call (CVE-2017-8890).

The IPv6 fragmentation implementation in the Linux kernel through 4.11.1 does not consider that the nexthdr field may be associated with an invalid option, which allows local users to cause a denial of service (out-of-bounds read and BUG) or possibly have unspecified other impact via crafted socket and send system calls (CVE-2017-9074).

The sctp_v6_create_accept_sk function in net/sctp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9075).

The dccp_v6_request_recv_sock function in net/dccp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9076).

The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9077).

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 (CVE-2017-9242).

The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call (CVE-2017-9605).

A vulnerability was found in the Linux kernel's lp_setup() function where it doesn't apply any bounds checking when passing "lp=none". This can result into overflow of the parport_nr[] array. An attacker with control over kernel command line can overwrite kernel code and data with fixed (0xff) values (CVE-2017-1000363).

A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult (CVE-2017-1000364).

The Linux Kernel imposes a size restriction on the arguments and environmental strings passed through RLIMIT_STACK/RLIM_INFINITY(1/4 of the size), but does not take the argument and environment pointers into account, which allows attackers to bypass this limitation. This affects Linux Kernel versions 4.11.5 and earlier (CVE-2017-1000365).

sound/core/timer.c in the Linux kernel…

This kernel-tmb update is based on upstream 4.4.74 and fixes at least the following security issues:

The ipxitf_ioctl function in net/ipx/af_ipx.c in the Linux kernel through 4.11.1 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a failed SIOCGIFADDR ioctl call for an IPX interface (CVE-2017-7487).

The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel through 4.10.15 allows attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call (CVE-2017-8890).

The IPv6 fragmentation implementation in the Linux kernel through 4.11.1 does not consider that the nexthdr field may be associated with an invalid option, which allows local users to cause a denial of service (out-of-bounds read and BUG) or possibly have unspecified other impact via crafted socket and send system calls (CVE-2017-9074).

The sctp_v6_create_accept_sk function in net/sctp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9075).

The dccp_v6_request_recv_sock function in net/dccp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9076).

The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9077).

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 (CVE-2017-9242).

The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call (CVE-2017-9605).

A vulnerability was found in the Linux kernel's lp_setup() function where it doesn't apply any bounds checking when passing "lp=none". This can result into overflow of the parport_nr[] array. An attacker with control over kernel command line can overwrite kernel code and data with fixed (0xff) values (CVE-2017-1000363).

A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult (CVE-2017-1000364).

The Linux Kernel imposes a size restriction on the arguments and environmental strings passed through RLIMIT_STACK/RLIM_INFINITY(1/4 of the size), but does not take the argument and environment pointers into account, which allows attackers to bypass this limitation. This affects Linux Kernel versions 4.11.5 and earlier (CVE-2017-1000365).

sound/core/timer.c in the Linux kernel…

This kernel-linus update is based on upstream 4.4.74 and fixes at least the following security issues:

The ipxitf_ioctl function in net/ipx/af_ipx.c in the Linux kernel through 4.11.1 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a failed SIOCGIFADDR ioctl call for an IPX interface (CVE-2017-7487).

The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel through 4.10.15 allows attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call (CVE-2017-8890).

The IPv6 fragmentation implementation in the Linux kernel through 4.11.1 does not consider that the nexthdr field may be associated with an invalid option, which allows local users to cause a denial of service (out-of-bounds read and BUG) or possibly have unspecified other impact via crafted socket and send system calls (CVE-2017-9074).

The sctp_v6_create_accept_sk function in net/sctp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9075).

The dccp_v6_request_recv_sock function in net/dccp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9076).

The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (CVE-2017-9077).

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 (CVE-2017-9242).

The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call (CVE-2017-9605).

A vulnerability was found in the Linux kernel's lp_setup() function where it doesn't apply any bounds checking when passing "lp=none". This can result into overflow of the parport_nr[] array. An attacker with control over kernel command line can overwrite kernel code and data with fixed (0xff) values (CVE-2017-1000363).

A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult (CVE-2017-1000364).

The Linux Kernel imposes a size restriction on the arguments and environmental strings passed through RLIMIT_STACK/RLIM_INFINITY(1/4 of the size), but does not take the argument and environment pointers into account, which allows attackers to bypass this limitation. This affects Linux Kernel versions 4.11.5 and earlier (CVE-2017-1000365).

sound/core/timer.c in the Linux kernel…

The SUSE Linux Enterprise 11 SP3 kernel was updated to receive various security fixes.

The following security bugs were fixed:

• CVE-2017-1000364: The default stack guard page was too small and could be 'jumped over' by userland programs using more than one page of stack in functions and so lead to memory corruption. This update extends the stack guard page to 1 MB (for 4k pages) and 16 MB (for 64k pages) to reduce this attack vector. This is not a kernel bugfix, but a hardening measure against this kind of userland attack.(bsc#1039348)

• CVE-2015-3288: mm/memory.c in the Linux kernel mishandled anonymous pages, which allowed local users to gain privileges or cause a denial of service (page tainting) via a crafted application that triggers writing to page zero (bnc#979021).

The SUSE Linux Enterprise 12 SP1 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2017-1000364: The default stack guard page was too small and could be 'jumped over' by userland programs using more than one page of stack in functions and so lead to memory corruption. This update extends the stack guard page to 1 MB (for 4k pages) and 16 MB (for 64k pages) to reduce this attack vector. This is not a kernel bugfix, but a hardening measure against this kind of userland attack.(bsc#1039348)

The following non-security bugs were fixed:

netfilter: A use-after-free was fixed that could cause a kernel panic on a system shutdown. (bsc#1042292)

The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2017-1000364: The default stack guard page was too small and could be 'jumped over' by userland programs using more than one page of stack in functions and so lead to memory corruption. This update extends the stack guard page to 1 MB (for 4k pages) and 16 MB (for 64k pages) to reduce this attack vector. This is not a kernel bugfix, but a hardening measure against this kind of userland attack.(bsc#1039348)

The following non-security bugs were fixed:

• There was a load failure in the sha-mb encryption implementation (bsc#1037384).

The SUSE Linux Enterprise 12 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2017-1000364: The default stack guard page was too small and could be 'jumped over' by userland programs using more than one page of stack in functions and so lead to memory corruption. This update extends the stack guard page to 1 MB (for 4k pages) and 16 MB (for 64k pages) to reduce this attack vector. This is not a kernel bugfix, but a hardening measure against this kind of userland attack.(bsc#1039348)

The following non-security bugs were fixed:

netfilter: A use-after-free was fixed that could cause a kernel panic on a system shutdown. (bsc#1042292)

The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2017-1000364: The default stack guard page was too small and could be 'jumped over' by userland programs using more than one page of stack in functions and so lead to memory corruption. This update extends the stack guard page to 1 MB (for 4k pages) and 16 MB (for 64k pages) to reduce this attack vector. This is not a kernel bugfix, but a hardening measure against this kind of userland attack.(bsc#1039348)

The following non-security bugs were fixed:

• fnic now returns 'DID_IMM_RETRY' if rport is not ready (bsc#1035920).
• fnic is now using rport->dd_data to check if rport is online instead of rport_lookup (bsc#1035920).
• The rport check location in fnic_queuecommand_lck was corrected (bsc#1035920).
• xfs: remove patches that caused regression (bsc#1043234).
• mm: enlarge stack guard gap (bnc#1039348, CVE-2017-1000364, bnc#1042921).
• PCI: Allow access to VPD attributes with size 0 (bsc#1018074).

This Linux kernel update for SUSE Linux Enterprise 11 SP4 fixes the following issues:

• A previous security update to address CVE-2017-1000364 caused unintended side-effects in several other tools, most notably Java. These issues have been remedied. [bsc#1045340, bsc#1045406]

This Linux kernel update for SUSE Linux Enterprise 12 SP1 fixes the following issues:

• A previous security update to address CVE-2017-1000364 caused unintended side-effects in several other tools, most notably Java. These issues have been remedied. [bsc#1045340]

The SUSE Linux Enterprise 11 SP3 kernel was updated to fix the following issues:

• A previous security update to address CVE-2017-1000364 caused unintended side-effects in several other tools, most notably Java. These issues have been remedied. [bsc#1045340, bsc#1045406]

This Linux kernel update for SUSE Linux Enterprise 12 SP2 fixes the following issues:

• A previous security update to address CVE-2017-1000364 caused unintended side-effects in several other tools, most notably Java. These issues have been remedied. [bsc#1045340]

This Linux kernel update for SUSE Linux Enterprise 12 fixes the following issues:

• A previous security update to address CVE-2017-1000364 caused unintended side-effects in several other tools, most notably Java. These issues have been remedied. [bsc#1045340]

This update for the Linux Kernel 4.4.59-92_20 fixes several issues.

The following bugs were fixed:

• CVE-2017-1000364: The previous fix for the stack gap increase tracked by CVE-2017-1000364 had a regression, which is fixed by this follow up patch. (bsc#1039496)

This update for the Linux Kernel 4.4.59-92_17 fixes one issue.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.60-52_57 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.60-52_60 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 4.4.21-81 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 4.4.21-69 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.67-60_64_18 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.62-60_64_8 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 4.4.49-92_11 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.61-52_77 fixes several issues.

The following bugs were fixed:

• CVE-2017-1000364: The previous fix for the stack gap increase tracked by CVE-2017-1000364 had a regression, which is fixed by this follow up patch. (bsc#1039496)

This update for the Linux Kernel 4.4.21-84 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 4.4.21-90 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.74-60_64_45 fixes several issues.

The following bugs were fixed:

• CVE-2017-1000364: The previous fix for the stack gap increase tracked by CVE-2017-1000364 had a regression, which is fixed by this follow up patch. (bsc#1039496)

This update for the Linux Kernel 3.12.60-52_63 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 4.4.38-93 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.61-52_66 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 4.4.49-92_14 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.69-60_64_29 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.61-52_72 fixes one issue.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).

This update for the Linux Kernel 3.12.69-60_64_32 fixes several issues.

The following security bugs were fixed:

• CVE-2017-1000364: An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be 'jumped' over (the stack guard page is bypassed) (bsc#1039496).